DOC: configuration: fix alphabetical order of bind options

Put the curves, ecdhe, severity-output, v4v6 and v6only keyword at the
right place.

Fix issue #2594.

Could be backported in every stable versions.

doc/configuration.txt

@@ -15852,19 +15852,6 @@ backlog <backlog>
   Sets the socket's backlog to this value. If unspecified or 0, the frontend's
   backlog is used instead, which generally defaults to the maxconn value.
 
-curves <curves>
-  This setting is only available when support for OpenSSL was built in. It sets
-  the string describing the list of elliptic curves algorithms ("curve suite")
-  that are negotiated during the SSL/TLS handshake with ECDHE. The format of the
-  string is a colon-delimited list of curve name.
-  Example: "X25519:P-256" (without quote)
-  When "curves" is set, "ecdhe" parameter is ignored.
-
-ecdhe <named curve>
-  This setting is only available when support for OpenSSL was built in. It sets
-  the named curve (RFC 4492) used to generate ECDH ephemeral keys. By default,
-  used named curve is prime256v1.
-
 ca-file <cafile>
   This setting is only available when support for OpenSSL was built in. It
   designates a PEM file from which to load CA certificates used to verify
@@ -16147,6 +16134,14 @@ default-crt <cert>
 
   See also the "crt" keyword.
 
+curves <curves>
+  This setting is only available when support for OpenSSL was built in. It sets
+  the string describing the list of elliptic curves algorithms ("curve suite")
+  that are negotiated during the SSL/TLS handshake with ECDHE. The format of the
+  string is a colon-delimited list of curve name.
+  Example: "X25519:P-256" (without quote)
+  When "curves" is set, "ecdhe" parameter is ignored.
+
 defer-accept
   Is an optional keyword which is supported only on certain Linux kernels. It
   states that a connection will only be accepted once some data arrive on it,
@@ -16160,6 +16155,11 @@ defer-accept
   an established connection while the proxy will only see it in SYN_RECV. This
   option is only supported on TCPv4/TCPv6 sockets and ignored by other ones.
 
+ecdhe <named curve>
+  This setting is only available when support for OpenSSL was built in. It sets
+  the named curve (RFC 4492) used to generate ECDH ephemeral keys. By default,
+  used named curve is prime256v1.
+
 expose-fd listeners
   This option is only usable with the stats socket. It gives your stats socket
   the capability to pass listeners FD to another HAProxy process.
@@ -16264,18 +16264,6 @@ level <level>
   - "admin" should be used with care, as everything is permitted (e.g. clear
     all counters).
 
-severity-output <format>
-  This setting is used with the stats sockets only to configure severity
-  level output prepended to informational feedback messages. Severity
-  level of messages can range between 0 and 7, conforming to syslog
-  rfc5424. Valid and successful socket commands requesting data
-  (i.e. "show map", "get acl foo" etc.) will never have a severity level
-  prepended. It is ignored by other sockets. <format> can be one of :
-  - "none" (default) no severity level is prepended to feedback messages.
-  - "number" severity level is prepended as a number.
-  - "string" severity level is prepended as a string following the
-    rfc5424 convention.
-
 maxconn <maxconn>
   Limits the sockets to this number of concurrent connections. Extraneous
   connections will remain in the system's backlog until a connection is
@@ -16482,6 +16470,18 @@ quic-socket [ connection | listener ]
   the specific listeners. See "tune.quic.socket-owner" for a full description
   of its usage.
 
+severity-output <format>
+  This setting is used with the stats sockets only to configure severity
+  level output prepended to informational feedback messages. Severity
+  level of messages can range between 0 and 7, conforming to syslog
+  rfc5424. Valid and successful socket commands requesting data
+  (i.e. "show map", "get acl foo" etc.) will never have a severity level
+  prepended. It is ignored by other sockets. <format> can be one of :
+  - "none" (default) no severity level is prepended to feedback messages.
+  - "number" severity level is prepended as a number.
+  - "string" severity level is prepended as a string following the
+    rfc5424 convention.
+
 shards <number> | by-thread | by-group
   In multi-threaded mode, on operating systems supporting multiple listeners on
   the same IP:port, this will automatically create this number of multiple
@@ -16664,20 +16664,6 @@ transparent
   kernel version. Some distribution kernels include backports of the feature,
   so check for support with your vendor.
 
-v4v6
-  Is an optional keyword which is supported only on most recent systems
-  including Linux kernels >= 2.4.21. It is used to bind a socket to both IPv4
-  and IPv6 when it uses the default address. Doing so is sometimes necessary
-  on systems which bind to IPv6 only by default. It has no effect on non-IPv6
-  sockets, and is overridden by the "v6only" option.
-
-v6only
-  Is an optional keyword which is supported only on most recent systems
-  including Linux kernels >= 2.4.21. It is used to bind a socket to IPv6 only
-  when it uses the default address. Doing so is sometimes preferred to doing it
-  system-wide as it is per-listener. It has no effect on non-IPv6 sockets and
-  has precedence over the "v4v6" option.
-
 uid <uid>
   Sets the owner of the UNIX sockets to the designated system uid. It can also
   be set by default in the global section's "unix-bind" statement. Note that
@@ -16692,6 +16678,20 @@ user <user>
   setting except that the user name is used instead of its uid. This setting is
   ignored by non UNIX sockets.
 
+v4v6
+  Is an optional keyword which is supported only on most recent systems
+  including Linux kernels >= 2.4.21. It is used to bind a socket to both IPv4
+  and IPv6 when it uses the default address. Doing so is sometimes necessary
+  on systems which bind to IPv6 only by default. It has no effect on non-IPv6
+  sockets, and is overridden by the "v6only" option.
+
+v6only
+  Is an optional keyword which is supported only on most recent systems
+  including Linux kernels >= 2.4.21. It is used to bind a socket to IPv6 only
+  when it uses the default address. Doing so is sometimes preferred to doing it
+  system-wide as it is per-listener. It has no effect on non-IPv6 sockets and
+  has precedence over the "v4v6" option.
+
 verify [none|optional|required]
   This setting is only available when support for OpenSSL was built in. If set
   to 'none', client certificate is not requested. This is the default. In other