MINOR: doc: document the -x flag
diff --git a/doc/haproxy.1 b/doc/haproxy.1
index 0a1b2f5..91f58a3 100644
--- a/doc/haproxy.1
+++ b/doc/haproxy.1
@@ -6,7 +6,7 @@
.SH SYNOPSIS
-haproxy \-f <configuration\ file|dir> [\-L\ <name>] [\-n\ maxconn] [\-N\ maxconn] [\-C\ <dir>] [\-v|\-vv] [\-d] [\-D] [\-q] [\-V] [\-c] [\-p\ <pidfile>] [\-dk] [\-ds] [\-de] [\-dp] [\-db] [\-dM[<byte>]] [\-m\ <megs>] [{\-sf|\-st}\ pidlist...]
+haproxy \-f <configuration\ file|dir> [\-L\ <name>] [\-n\ maxconn] [\-N\ maxconn] [\-C\ <dir>] [\-v|\-vv] [\-d] [\-D] [\-q] [\-V] [\-c] [\-p\ <pidfile>] [\-dk] [\-ds] [\-de] [\-dp] [\-db] [\-dM[<byte>]] [\-m\ <megs>] [\-x <unix_socket>] [{\-sf|\-st}\ pidlist...]
.SH DESCRIPTION
@@ -155,6 +155,12 @@
sessions. This option must be specified last, followed by any number of
PIDs. Technically speaking, \fBSIGTTOU\fP and \fBSIGTERM\fP are sent.
+.TP
+\f8\-x <unix_socket>\fP
+Attempt to connect to the unix socket, and retrieve all the listening sockets
+from the old process. Those sockets will then be used if possible instead of
+binding new ones.
+
.SH LOGGING
Since HAProxy can run inside a chroot, it cannot reliably access /dev/log.
For this reason, it uses the UDP protocol to send its logs to the server,