CHANGELOG - haproxy - Gitiles

 ChangeLog :
 ===========

 2005/04/25 : 1.2.5-pre3
   - experimental epoll() support (use temporary '-e' argument)

 2005/04/24 : 1.2.5-pre2
   - implemented the HTTP 303 code for error redirection. This forces the
     browser to fetch the given URI with a GET request. The new keyword for
     this is 'errorloc303', and a new 'errorloc302' keyword has been created
     to make them easily distinguishable.
   - added more controls in the parser for valid use of '\x' sequence.
   - few fixes from Alex & Klaus

 2005/02/17 : 1.2.5-pre1
   - fixed a few errors in the documentation

 2005/02/13
   - do not pre-initialize unused file-descriptors before select() anymore.

 2005/01/22 : 1.2.4
   - merged Alexander Lazic's and Klaus Wagner's work on application
     cookie-based persistence. Since this is the first merge, this version is
     not intended for general use and reports are more than welcome. Some
     documentation is really needed though.

 2005/01/22 : 1.2.3 (1.1.30)
   - add an architecture guide to the documentation
   - released without any changes

 2004/12/26 : 1.2.3-pre1 (1.1.30-pre1)
   - increased default BUFSIZE to 16 kB to accept max headers of 8 kB which is
     compatible with Apache. This limit can be configured in the makefile now.
     Thanks to Eric Fehr for the checks.
   - added a per-server "source" option which now makes it possible to bind to
     a different source for each (potentially identical) server.
   - changed cookie-based server selection slightly to allow several servers to
     share a same cookie, thus making it possible to associate backup servers to
     live servers and ease soft-stop for maintenance periods. (Alexander Lazic)
   - added the cookie 'prefix' mode which makes it possible to use persistence
     with thin clients which support only one cookie. The server name is prefixed
     before the application cookie, and restore back.
   - fixed the order of servers within an instance to match documentation. Now
     the servers are *really* used in the order of their declaration. This is
     particularly important when multiple backup servers are in use.

 2004/10/18 : 1.2.2 (1.1.29)
   - fixed a bug where a TCP connection would be logged twice if the 'logasap'
     option was enabled without the 'tcplog' option.
   - encode_string() would use hdr_encode_map instead of the map argument.

 2004/08/10 : (1.1.29-pre2)
   - the logged request is now encoded with '#XX' for unprintable characters
   - new keywords 'capture request header' and 'capture response header' enable
     logging of arbitrary HTTP headers in requests and responses
   - removed "-DSOLARIS" after replacing the last inet_aton() with inet_pton()

 2004/06/06 : 1.2.1 (1.1.28)
   - added the '-V' command line option to verbosely report errors even though
     the -q or 'quiet' options are specified. This is useful with '-c'.
   - added a Red Hat init script and a .spec from Simon Matter <simon.matter@invoca.ch>

 2004/06/05 :
   - added the "logasap" option which produces a log without waiting for the data
     to be transferred from the server to the client.
   - added the "httpclose" option which removes any "connection:" header and adds
     "Connection: close" in both direction.
   - added the 'checkcache' option which blocks cacheable responses containing
     dangerous headers, such as 'set-cookie'.
   - added 'rspdeny' and 'rspideny' to block certain responses to avoid sensible
     information leak from servers.

 2004/04/18 :
   - send an EMERG log when no server is available for a given proxy
   - added the '-c' command line option to syntactically check the
     configuration file without starting the service.

 2003/11/09 : 1.2.0
   - the same as 1.1.27 + IPv6 support on the client side

 2003/10/27 : 1.1.27
   - the configurable HTTP health check introduced in 1.1.23 revealed a shameful
     bug : the code still assumed that HTTP requests were the same size as the
     original ones (22 bytes), and failed if they were not.
   - added support for pidfiles.

 2003/10/22 : 1.1.26
   - the fix introduced in 1.1.25 for client timeouts while waiting for servers
     broke almost all compatibility with POST requests, because the proxy
     stopped to read anything from the client as soon as it got all of its
     headers.

 2003/10/15 : 1.1.25
   - added the 'tcplog' option, which provides enhanced, HTTP-like logs for
     generic TCP proxies, or lighter logs for HTTP proxies.
   - fixed a time-out condition wrongly reported as client time-out in data
     phase if the client timeout was lower than the connect timeout times the
     number of retries.

 2003/09/21 : 1.1.24
   - if a client sent a full request then shut its write connection down, then
     the request was aborted. This case was detected only when using haproxy
     both as health-check client and as a server.
   - if 'option httpchk' is used in a 'health' mode server, then responses will
     change from 'OK' to 'HTTP/1.0 200 OK'.
   - fixed a Linux-only bug in case of HTTP server health-checks, where a single
     server response followed by a close could be ignored, and the server seen
     as failed.

 2003/09/19 : 1.1.23
   - fixed a stupid bug introduced in 1.1.22 which caused second and subsequent
     'default' sections to keep previous parameters, and not initialize logs
     correctly.
   - fixed a second stupid bug introduced in 1.1.22 which caused configurations
     relying on 'dispatch' mode to segfault at the first connection.
   - 'option httpchk' now supports method, HTTP version and a few headers.
   - now, 'option httpchk', 'cookie' and 'capture' can be specified in
     'defaults' section

 2003/09/10 : 1.1.22
   - 'listen' now supports optionnal address:port-range lists
   - 'bind' introduced to add new listen addresses
   - fixed a bug which caused a session to be kept established on a server till
     it timed out if the client closed during the DATA phase.
   - the port part of each server address can now be empty to make the proxy
     connect to the server on the same port it was connected to, be an absolute
     unsigned number to reflect a single port (as in older versions), or an
     explicitly signed number (+N/-N) to indicate that this offset must be
     applied to the port the proxy was connected to, when connecting to the
     server.
   - the 'port' server option allows the user to specify a different
     health-check port than the service one. It is mandatory when only relative
     ports have been specified and check is required. By default, the checks are
     sent to the service port.
   - new 'defaults' section which is rather similar to 'listen' except that all
     values are only used as default values for future 'listen' sections, until
     a new 'defaults' resets them. At the moment, server options, regexes,
     cookie names and captures cannot be set in the 'defaults' section.

 2003/05/06 : 1.1.21
   - changed the debug output format so that it now includes the session unique
     ID followed by the instance name at the beginning of each line.
   - in debug mode, accept now shows the client's IP and port.
   - added one 3 small debugging scripts to search and pretty print debug output
   - changed the default health check request to "OPTIONS /" instead of
     "OPTIONS *" since not all servers implement the later one.
   - "option httpchk" now accepts an optional parameter allowing the user to
     specify and URI other than '/' during health-checks.

 2003/04/21 : 1.1.20
   - fixed two problems with time-outs, one where a server would be logged as
     timed out during transfer that take longer to complete than the fixed
     time-out, and one where clients were logged as timed-out during the data
     phase because they didn't have anything to send. This sometimes caused
     slow client connections to close too early while in fact there was no
     problem. The proper fix would be to have a per-fd time-out with
     conditions depending on the state of the HTTP FSM.

 2003/04/16 : 1.1.19
   - haproxy was NOT RFC compliant because it was case-sensitive on HTTP
     "Cookie:" and "Set-Cookie:" headers. This caused JVM 1.4 to fail on
     cookie persistence because it uses "cookie:". Two memcmp() have been
     replaced with strncasecmp().

 2003/04/02 : 1.1.18
   - Haproxy can be compiled with PCRE regex instead of libc regex, by setting
     REGEX=pcre on the make command line.
   - HTTP health-checks now use "OPTIONS *" instead of "OPTIONS /".
   - when explicit source address binding is required, it is now also used for
     health-checks.
   - added 'reqpass' and 'reqipass' to allow certain headers but not the request
     itself.
   - factored several strings to reduce binary size by about 2 kB.
   - replaced setreuid() and setregid() with more standard setuid() and setgid().
   - added 4 status flags to the log line indicating who ended the connection
     first, the sessions state, the validity of the cookie, and action taken on
     the set-cookie header.

 2002/10/18 : 1.1.17
   - add the notion of "backup" servers, which are used only when all other
     servers are down.
   - make Set-Cookie return "" instead of "(null)" when the server has no
     cookie assigned (useful for backup servers).
   - "log" now supports an optionnal level name (info, notice, err ...) above
     which nothing is sent.
   - replaced some strncmp() with memcmp() for better efficiency.
   - added "capture cookie" option which logs client and/or server cookies
   - cleaned up/down messages and dump servers states upon SIGHUP
   - added a redirection feature for errors : "errorloc <errnum> <url>"
   - now we won't insist on connecting to a dead server, even with a cookie,
     unless option "persist" is specified.
   - added HTTP/408 response for client request time-out and HTTP/50[234] for
     server reply time-out or errors.

 2002/09/01 : 1.1.16
   - implement HTTP health checks when option "httpchk" is specified.

 2002/08/07 : 1.1.15
   - replaced setpgid()/setpgrp() with setsid() for better portability, because
     setpgrp() doesn't have the same meaning under Solaris, Linux, and OpenBSD.

 2002/07/20 : 1.1.14
   - added "postonly" cookie mode

 2002/07/15 : 1.1.13
   - tv_diff used inverted parameters which led to negative times !

 2002/07/13 : 1.1.12
   - fixed stats monitoring, and optimized some tv_* for most common cases.
   - replaced temporary 'newhdr' with 'trash' to reduce stack size
   - made HTTP errors more HTML-fiendly.
   - renamed strlcpy() to strlcpy2() because of a slightly difference between
     their behaviour (return value), to avoid confusion.
   - restricted HTTP messages to HTTP proxies only
   - added a 502 message when the connection has been refused by the server,
     to prevent clients from believing this is a zero-byte HTTP 0.9 reply.
   - changed 'Cache-control:' from 'no-cache="set-cookie"' to 'private' when
     inserting a cookie, because some caches (apache) don't understand it.
   - fixed processing of server headers when client is in SHUTR state

 2002/07/04 :
   - automatically close fd's 0,1 and 2 when going daemon ; setpgrp() after
     setpgid()

 2002/06/04 : 1.1.11
   - fixed multi-cookie handling in client request to allow clean deletion
     in insert+indirect mode. Now, only the server cookie is deleted and not
     all the header. Should now be compliant to RFC2965.
   - added a "nocache" option to "cookie" to specify that we explicitly want
     to add a "cache-control" header when we add a cookie.
     It is also possible to add an "Expires: <old-date>" to keep compatibility
     with old/broken caches.

 2002/05/10 : 1.1.10
   - if a cookie is used in insert+indirect mode, it's desirable that the
     the servers don't see it. It was not possible to remove it correctly
     with regexps, so now it's removed automatically.

 2002/04/19 : 1.1.9
   - don't use snprintf()'s return value as an end of message since it may
     be larger. This caused bus errors and segfaults in internal libc's
     getenv() during localtime() in send_log().
   - removed dead insecure send_syslog() function and all references to it.
   - fixed warnings on Solaris due to buggy implementation of isXXXX().

 2002/04/18 : 1.1.8
   - option "dontlognull"
   - fixed "double space" bug in config parser
   - fixed an uninitialized server field in case of dispatch
     with no existing server which could cause a segfault during
     logging.
   - the pid logged was always the father's, which was wrong for daemons.
   - fixed wrong level "LOG_INFO" for message "proxy started".

 2002/04/13 :
   - http logging is now complete :
     - ip:port, date, proxy, server
     - req_time, conn_time, hdr_time, tot_time
     - status, size, request
   - source address

 2002/04/12 : 1.1.7
   - added option forwardfor
   - added reqirep, reqidel, reqiallow, reqideny, rspirep, rspidel
   - added "log global" in "listen" section.

 2002/04/09 :
   - added a new "global" section :
     - logs
     - debug, quiet, daemon modes
     - uid, gid, chroot, nbproc, maxconn

 2002/04/08 : 1.1.6
   - regex are now chained and not limited anymore.
   - unavailable server now returns HTTP/502.
   - increased per-line args limit to 40
   - added reqallow/reqdeny to block some request on matches
   - added HTTP 400/403 responses

 2002/04/03 : 1.1.5
   - connection logging displayed incorrect source address.
   - added proxy start/stop and server up/down log events.
   - replaced log message short buffers with larger trash.
   - enlarged buffer to 8 kB and replace buffer to 4 kB.

 2002/03/25 : 1.1.4
   - made rise/fall/interval time configurable

 2002/03/22 : 1.1.3
   - fixed a bug : cr_expire and cw_expire were inverted in CL_STSHUT[WR]
     which could lead to loops.

 2002/03/21 : 1.1.2
   - fixed a bug in buffer management where we could have a loop
     between event_read() and process_{cli|srv} if R==BUFSIZE-MAXREWRITE.
     => implemented an adjustable buffer limit.
   - fixed a bug : expiration of tasks in wait queue timeout is used again,
     and running tasks are skipped.
   - added some debug lines for accept events.
   - send warnings for servers up/down.

 2002/03/12 : 1.1.1
   - fixed a bug in total failure handling
   - fixed a bug in timestamp comparison within same second (tv_cmp_ms)

 2002/03/10 : 1.1.0
   - fixed a few timeout bugs
   - rearranged the task scheduler subsystem to improve performance,
     add new tasks, and make it easier to later port to librt ;
   - allow multiple accept() for one select() wake up ;
   - implemented internal load balancing with basic health-check ;
   - cookie insertion and header add/replace/delete, with better strings
     support.

 2002/03/08
   - reworked buffer handling to fix a few rewrite bugs, and
     improve overall performance.
   - implement the "purge" option to delete server cookies in direct mode.

 2002/03/07
   - fixed some error cases where the maxfd was not decreased.

 2002/02/26
   - now supports transparent proxying, at least on linux 2.4.

 2002/02/12
   - soft stop works again (fixed select timeout computation).
   - it seems that TCP proxies sometimes cannot timeout.
   - added a "quiet" mode.
   - enforce file descriptor limitation on socket() and accept().

 2001/12/30 : release of version 1.0.2 : fixed a bug in header processing
 2001/12/19 : release of version 1.0.1 : no MSG_NOSIGNAL on solaris
 2001/12/16 : release of version 1.0.0.
 2001/12/16 : added syslog capability for each accepted connection.
 2001/11/19 : corrected premature end of files and occasional SIGPIPE.
 2001/10/31 : added health-check type servers (mode health) which replies OK then closes.
 2001/10/30 : added the ability to support standard TCP proxies and HTTP proxies
 		with or without cookies (use keyword http for this).
 2001/09/01 : added client/server header replacing with regexps.
 		eg:
        		cliexp ^(Host:\ [^:]*).* Host:\ \1:80
        		srvexp ^Server:\ .* Server:\ Apache
 2000/11/29 : first fully working release with complete FSMs and timeouts.
 2000/11/28 : major rewrite
 2000/11/26 : first write
	ChangeLog :
	===========

	2005/04/25 : 1.2.5-pre3
	- experimental epoll() support (use temporary '-e' argument)

	2005/04/24 : 1.2.5-pre2
	- implemented the HTTP 303 code for error redirection. This forces the
	browser to fetch the given URI with a GET request. The new keyword for
	this is 'errorloc303', and a new 'errorloc302' keyword has been created
	to make them easily distinguishable.
	- added more controls in the parser for valid use of '\x' sequence.
	- few fixes from Alex & Klaus

	2005/02/17 : 1.2.5-pre1
	- fixed a few errors in the documentation

	2005/02/13
	- do not pre-initialize unused file-descriptors before select() anymore.

	2005/01/22 : 1.2.4
	- merged Alexander Lazic's and Klaus Wagner's work on application
	cookie-based persistence. Since this is the first merge, this version is
	not intended for general use and reports are more than welcome. Some
	documentation is really needed though.

	2005/01/22 : 1.2.3 (1.1.30)
	- add an architecture guide to the documentation
	- released without any changes

	2004/12/26 : 1.2.3-pre1 (1.1.30-pre1)
	- increased default BUFSIZE to 16 kB to accept max headers of 8 kB which is
	compatible with Apache. This limit can be configured in the makefile now.
	Thanks to Eric Fehr for the checks.
	- added a per-server "source" option which now makes it possible to bind to
	a different source for each (potentially identical) server.
	- changed cookie-based server selection slightly to allow several servers to
	share a same cookie, thus making it possible to associate backup servers to
	live servers and ease soft-stop for maintenance periods. (Alexander Lazic)
	- added the cookie 'prefix' mode which makes it possible to use persistence
	with thin clients which support only one cookie. The server name is prefixed
	before the application cookie, and restore back.
	- fixed the order of servers within an instance to match documentation. Now
	the servers are really used in the order of their declaration. This is
	particularly important when multiple backup servers are in use.

	2004/10/18 : 1.2.2 (1.1.29)
	- fixed a bug where a TCP connection would be logged twice if the 'logasap'
	option was enabled without the 'tcplog' option.
	- encode_string() would use hdr_encode_map instead of the map argument.

	2004/08/10 : (1.1.29-pre2)
	- the logged request is now encoded with '#XX' for unprintable characters
	- new keywords 'capture request header' and 'capture response header' enable
	logging of arbitrary HTTP headers in requests and responses
	- removed "-DSOLARIS" after replacing the last inet_aton() with inet_pton()

	2004/06/06 : 1.2.1 (1.1.28)
	- added the '-V' command line option to verbosely report errors even though
	the -q or 'quiet' options are specified. This is useful with '-c'.
	- added a Red Hat init script and a .spec from Simon Matter <simon.matter@invoca.ch>

	2004/06/05 :
	- added the "logasap" option which produces a log without waiting for the data
	to be transferred from the server to the client.
	- added the "httpclose" option which removes any "connection:" header and adds
	"Connection: close" in both direction.
	- added the 'checkcache' option which blocks cacheable responses containing
	dangerous headers, such as 'set-cookie'.
	- added 'rspdeny' and 'rspideny' to block certain responses to avoid sensible
	information leak from servers.

	2004/04/18 :
	- send an EMERG log when no server is available for a given proxy
	- added the '-c' command line option to syntactically check the
	configuration file without starting the service.

	2003/11/09 : 1.2.0
	- the same as 1.1.27 + IPv6 support on the client side

	2003/10/27 : 1.1.27
	- the configurable HTTP health check introduced in 1.1.23 revealed a shameful
	bug : the code still assumed that HTTP requests were the same size as the
	original ones (22 bytes), and failed if they were not.
	- added support for pidfiles.

	2003/10/22 : 1.1.26
	- the fix introduced in 1.1.25 for client timeouts while waiting for servers
	broke almost all compatibility with POST requests, because the proxy
	stopped to read anything from the client as soon as it got all of its
	headers.

	2003/10/15 : 1.1.25
	- added the 'tcplog' option, which provides enhanced, HTTP-like logs for
	generic TCP proxies, or lighter logs for HTTP proxies.
	- fixed a time-out condition wrongly reported as client time-out in data
	phase if the client timeout was lower than the connect timeout times the
	number of retries.

	2003/09/21 : 1.1.24
	- if a client sent a full request then shut its write connection down, then
	the request was aborted. This case was detected only when using haproxy
	both as health-check client and as a server.
	- if 'option httpchk' is used in a 'health' mode server, then responses will
	change from 'OK' to 'HTTP/1.0 200 OK'.
	- fixed a Linux-only bug in case of HTTP server health-checks, where a single
	server response followed by a close could be ignored, and the server seen
	as failed.

	2003/09/19 : 1.1.23
	- fixed a stupid bug introduced in 1.1.22 which caused second and subsequent
	'default' sections to keep previous parameters, and not initialize logs
	correctly.
	- fixed a second stupid bug introduced in 1.1.22 which caused configurations
	relying on 'dispatch' mode to segfault at the first connection.
	- 'option httpchk' now supports method, HTTP version and a few headers.
	- now, 'option httpchk', 'cookie' and 'capture' can be specified in
	'defaults' section

	2003/09/10 : 1.1.22
	- 'listen' now supports optionnal address:port-range lists
	- 'bind' introduced to add new listen addresses
	- fixed a bug which caused a session to be kept established on a server till
	it timed out if the client closed during the DATA phase.
	- the port part of each server address can now be empty to make the proxy
	connect to the server on the same port it was connected to, be an absolute
	unsigned number to reflect a single port (as in older versions), or an
	explicitly signed number (+N/-N) to indicate that this offset must be
	applied to the port the proxy was connected to, when connecting to the
	server.
	- the 'port' server option allows the user to specify a different
	health-check port than the service one. It is mandatory when only relative
	ports have been specified and check is required. By default, the checks are
	sent to the service port.
	- new 'defaults' section which is rather similar to 'listen' except that all
	values are only used as default values for future 'listen' sections, until
	a new 'defaults' resets them. At the moment, server options, regexes,
	cookie names and captures cannot be set in the 'defaults' section.

	2003/05/06 : 1.1.21
	- changed the debug output format so that it now includes the session unique
	ID followed by the instance name at the beginning of each line.
	- in debug mode, accept now shows the client's IP and port.
	- added one 3 small debugging scripts to search and pretty print debug output
	- changed the default health check request to "OPTIONS /" instead of
	"OPTIONS *" since not all servers implement the later one.
	- "option httpchk" now accepts an optional parameter allowing the user to
	specify and URI other than '/' during health-checks.

	2003/04/21 : 1.1.20
	- fixed two problems with time-outs, one where a server would be logged as
	timed out during transfer that take longer to complete than the fixed
	time-out, and one where clients were logged as timed-out during the data
	phase because they didn't have anything to send. This sometimes caused
	slow client connections to close too early while in fact there was no
	problem. The proper fix would be to have a per-fd time-out with
	conditions depending on the state of the HTTP FSM.

	2003/04/16 : 1.1.19
	- haproxy was NOT RFC compliant because it was case-sensitive on HTTP
	"Cookie:" and "Set-Cookie:" headers. This caused JVM 1.4 to fail on
	cookie persistence because it uses "cookie:". Two memcmp() have been
	replaced with strncasecmp().

	2003/04/02 : 1.1.18
	- Haproxy can be compiled with PCRE regex instead of libc regex, by setting
	REGEX=pcre on the make command line.
	- HTTP health-checks now use "OPTIONS *" instead of "OPTIONS /".
	- when explicit source address binding is required, it is now also used for
	health-checks.
	- added 'reqpass' and 'reqipass' to allow certain headers but not the request
	itself.
	- factored several strings to reduce binary size by about 2 kB.
	- replaced setreuid() and setregid() with more standard setuid() and setgid().
	- added 4 status flags to the log line indicating who ended the connection
	first, the sessions state, the validity of the cookie, and action taken on
	the set-cookie header.

	2002/10/18 : 1.1.17
	- add the notion of "backup" servers, which are used only when all other
	servers are down.
	- make Set-Cookie return "" instead of "(null)" when the server has no
	cookie assigned (useful for backup servers).
	- "log" now supports an optionnal level name (info, notice, err ...) above
	which nothing is sent.
	- replaced some strncmp() with memcmp() for better efficiency.
	- added "capture cookie" option which logs client and/or server cookies
	- cleaned up/down messages and dump servers states upon SIGHUP
	- added a redirection feature for errors : "errorloc <errnum> <url>"
	- now we won't insist on connecting to a dead server, even with a cookie,
	unless option "persist" is specified.
	- added HTTP/408 response for client request time-out and HTTP/50[234] for
	server reply time-out or errors.

	2002/09/01 : 1.1.16
	- implement HTTP health checks when option "httpchk" is specified.

	2002/08/07 : 1.1.15
	- replaced setpgid()/setpgrp() with setsid() for better portability, because
	setpgrp() doesn't have the same meaning under Solaris, Linux, and OpenBSD.

	2002/07/20 : 1.1.14
	- added "postonly" cookie mode

	2002/07/15 : 1.1.13
	- tv_diff used inverted parameters which led to negative times !

	2002/07/13 : 1.1.12
	- fixed stats monitoring, and optimized some tv_* for most common cases.
	- replaced temporary 'newhdr' with 'trash' to reduce stack size
	- made HTTP errors more HTML-fiendly.
	- renamed strlcpy() to strlcpy2() because of a slightly difference between
	their behaviour (return value), to avoid confusion.
	- restricted HTTP messages to HTTP proxies only
	- added a 502 message when the connection has been refused by the server,
	to prevent clients from believing this is a zero-byte HTTP 0.9 reply.
	- changed 'Cache-control:' from 'no-cache="set-cookie"' to 'private' when
	inserting a cookie, because some caches (apache) don't understand it.
	- fixed processing of server headers when client is in SHUTR state

	2002/07/04 :
	- automatically close fd's 0,1 and 2 when going daemon ; setpgrp() after
	setpgid()

	2002/06/04 : 1.1.11
	- fixed multi-cookie handling in client request to allow clean deletion
	in insert+indirect mode. Now, only the server cookie is deleted and not
	all the header. Should now be compliant to RFC2965.
	- added a "nocache" option to "cookie" to specify that we explicitly want
	to add a "cache-control" header when we add a cookie.
	It is also possible to add an "Expires: <old-date>" to keep compatibility
	with old/broken caches.

	2002/05/10 : 1.1.10
	- if a cookie is used in insert+indirect mode, it's desirable that the
	the servers don't see it. It was not possible to remove it correctly
	with regexps, so now it's removed automatically.

	2002/04/19 : 1.1.9
	- don't use snprintf()'s return value as an end of message since it may
	be larger. This caused bus errors and segfaults in internal libc's
	getenv() during localtime() in send_log().
	- removed dead insecure send_syslog() function and all references to it.
	- fixed warnings on Solaris due to buggy implementation of isXXXX().

	2002/04/18 : 1.1.8
	- option "dontlognull"
	- fixed "double space" bug in config parser
	- fixed an uninitialized server field in case of dispatch
	with no existing server which could cause a segfault during
	logging.
	- the pid logged was always the father's, which was wrong for daemons.
	- fixed wrong level "LOG_INFO" for message "proxy started".

	2002/04/13 :
	- http logging is now complete :
	- ip:port, date, proxy, server
	- req_time, conn_time, hdr_time, tot_time
	- status, size, request
	- source address

	2002/04/12 : 1.1.7
	- added option forwardfor
	- added reqirep, reqidel, reqiallow, reqideny, rspirep, rspidel
	- added "log global" in "listen" section.

	2002/04/09 :
	- added a new "global" section :
	- logs
	- debug, quiet, daemon modes
	- uid, gid, chroot, nbproc, maxconn

	2002/04/08 : 1.1.6
	- regex are now chained and not limited anymore.
	- unavailable server now returns HTTP/502.
	- increased per-line args limit to 40
	- added reqallow/reqdeny to block some request on matches
	- added HTTP 400/403 responses

	2002/04/03 : 1.1.5
	- connection logging displayed incorrect source address.
	- added proxy start/stop and server up/down log events.
	- replaced log message short buffers with larger trash.
	- enlarged buffer to 8 kB and replace buffer to 4 kB.

	2002/03/25 : 1.1.4
	- made rise/fall/interval time configurable

	2002/03/22 : 1.1.3
	- fixed a bug : cr_expire and cw_expire were inverted in CL_STSHUT[WR]
	which could lead to loops.

	2002/03/21 : 1.1.2
	- fixed a bug in buffer management where we could have a loop
	between event_read() and process_{cli\|srv} if R==BUFSIZE-MAXREWRITE.
	=> implemented an adjustable buffer limit.
	- fixed a bug : expiration of tasks in wait queue timeout is used again,
	and running tasks are skipped.
	- added some debug lines for accept events.
	- send warnings for servers up/down.

	2002/03/12 : 1.1.1
	- fixed a bug in total failure handling
	- fixed a bug in timestamp comparison within same second (tv_cmp_ms)

	2002/03/10 : 1.1.0
	- fixed a few timeout bugs
	- rearranged the task scheduler subsystem to improve performance,
	add new tasks, and make it easier to later port to librt ;
	- allow multiple accept() for one select() wake up ;
	- implemented internal load balancing with basic health-check ;
	- cookie insertion and header add/replace/delete, with better strings
	support.

	2002/03/08
	- reworked buffer handling to fix a few rewrite bugs, and
	improve overall performance.
	- implement the "purge" option to delete server cookies in direct mode.

	2002/03/07
	- fixed some error cases where the maxfd was not decreased.

	2002/02/26
	- now supports transparent proxying, at least on linux 2.4.

	2002/02/12
	- soft stop works again (fixed select timeout computation).
	- it seems that TCP proxies sometimes cannot timeout.
	- added a "quiet" mode.
	- enforce file descriptor limitation on socket() and accept().

	2001/12/30 : release of version 1.0.2 : fixed a bug in header processing
	2001/12/19 : release of version 1.0.1 : no MSG_NOSIGNAL on solaris
	2001/12/16 : release of version 1.0.0.
	2001/12/16 : added syslog capability for each accepted connection.
	2001/11/19 : corrected premature end of files and occasional SIGPIPE.
	2001/10/31 : added health-check type servers (mode health) which replies OK then closes.
	2001/10/30 : added the ability to support standard TCP proxies and HTTP proxies
	with or without cookies (use keyword http for this).
	2001/09/01 : added client/server header replacing with regexps.
	eg:
	cliexp ^(Host:\ [^:]). Host:\ \1:80
	srvexp ^Server:\ .* Server:\ Apache
	2000/11/29 : first fully working release with complete FSMs and timeouts.
	2000/11/28 : major rewrite
	2000/11/26 : first write