[RELEASE] Released version 2.5-dev3

Released version 2.5-dev3 with the following main changes :
    - BUG/MINOR: arg: free all args on make_arg_list()'s error path
    - BUG/MINOR: cfgcond: revisit the condition freeing mechanism to avoid a leak
    - MEDIUM: proxy: remove long-broken 'option http_proxy'
    - CLEANUP: http_ana: Remove now unused label from http_process_request()
    - MINOR: deinit: always deinit the init_mutex on failed initialization
    - BUG/MEDIUM: cfgcond: limit recursion level in the condition expression parser
    - BUG/MEDIUM: mworker: do not register an exit handler if exit is expected
    - BUG/MINOR: mworker: do not export HAPROXY_MWORKER_REEXEC across programs
    - BUILD/MINOR: memprof fix macOs build.
    - BUG/MEDIUM: ssl_sample: fix segfault for srv samples on invalid request
    - BUG/MINOR: stats: Add missing agent stats on servers
    - BUG/MINOR: check: fix the condition to validate a port-less server
    - BUILD: threads: fix pthread_mutex_unlock when !USE_THREAD
    - BUG/MINOR: resolvers: Use a null-terminated string to lookup in servers tree
    - MINOR: ssl: use __objt_* variant when retrieving counters
    - BUG/MINOR: systemd: must check the configuration using -Ws
    - BUG/MINOR: mux-h1: Obey dontlognull option for empty requests
    - BUG/MINOR: mux-h2: Obey dontlognull option during the preface
    - BUG/MINOR: mux-h1: Be sure to swap H1C to splice mode when rcv_pipe() is called
    - BUG/MEDIUM: mux-h2: Handle remaining read0 cases on partial frames
    - MINOR: proxy: rename PR_CAP_LUA to PR_CAP_INT
    - MINOR: mworker: the mworker CLI proxy is internal
    - MINOR: stats: don't output internal proxies (PR_CAP_INT)
    - CLEANUP: mworker: use the proxy helper functions in mworker_cli_proxy_create()
    - CLEANUP: mworker: PR_CAP already initialized with alloc_new_proxy()
    - BUG/MINOR: connection: Add missing error labels to conn_err_code_str
    - MINOR: connection: Add a connection error code sample fetch
    - MINOR: ssl: Enable error fetches in case of handshake error
    - MINOR: ssl: Add new ssl_fc_hsk_err sample fetch
    - MINOR: ssl: Define a default https log format
    - MEDIUM: connection: Add option to disable legacy error log
    - REGTESTS: ssl: Add tests for the connection and SSL error fetches
    - REGTESTS: ssl: ssl_errors.vtc does not work with old openssl version
    - BUG/MEDIUM: connection: close a rare race between idle conn close and takeover
    - BUG/MEDIUM: pollers: clear the sleeping bit after waking up, not before
    - BUG/MINOR: select: fix excess number of dead/skip reported
    - BUG/MINOR: poll: fix abnormally high skip_fd counter
    - BUG/MINOR: pollers: always program an update for migrated FDs
    - BUG/MINOR: fd: protect fd state harder against a concurrent takeover
    - DOC: internals: document the FD takeover process
    - MINOR: fd: update flags only once in fd_update_events()
    - MINOR: poll/epoll: move detection of RDHUP support earlier
    - REORG: fd: uninline fd_update_events()
    - MEDIUM: fd: rely more on fd_update_events() to detect changes
    - BUG/MINOR: freq_ctr: use stricter barriers between updates and readings
    - MEDIUM: atomic: simplify the atomic load/store/exchange operations
    - MEDIUM: atomic: relax the load/store barriers on x86_64
    - BUILD: opentracing: fixed build when using pkg-config utility
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 6ecf7bc..6a820b3 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -4,7 +4,7 @@
                          ----------------------
                               version 2.5
                              willy tarreau
-                              2021/07/17
+                              2021/08/01
 
 
 This document covers the configuration language as implemented in the version