Log Message:
Update to latest stable release, 1.4.25. Some changes to files/haproxy.sh:

* Don't hardcode PREFIX nor PKG_SYSCONFDIR;
* Add a configtest() function to test the configuration file before restart
  so lazy SysOps (me) don't have to remember command arguments;

From CHANGELOG:

    - DOC: typo: nosepoll self reference in config guide
    - BUG/MINOR: deinit: free fdinfo while doing cleanup
    - BUG/MEDIUM: server: set the macro for server's max weight SRV_UWGHT_MAX to \ 
SRV_UWGHT_RANGE
    - BUG/MINOR: use the same check condition for server as other algorithms
    - BUG/MINOR: stream-int: also consider ENOTCONN in addition to EAGAIN for recv()
    - BUG/MINOR: fix forcing fastinter in "on-error"
    - BUG/MEDIUM: http/auth: Sometimes the authentication credentials can be mix \ 
between two requests
    - BUG/MAJOR: http: don't emit the send-name-header when no server is available
    - BUG/MEDIUM: http: "option checkcache" fails with the no-cache header
    - MEDIUM: session: disable lingering on the server when the client aborts
    - MINOR: config: warn when a server with no specific port uses rdp-cookie
    - MEDIUM: increase chunk-size limit to 2GB-1
    - DOC: add a mention about the limited chunk size
    - MEDIUM: http: add "redirect scheme" to ease HTTP to HTTPS redirection
    - BUILD: proto_tcp: remove a harmless warning
    - BUG/MINOR: acl: remove patterns from the tree before freeing them
    - BUG/MEDIUM: checks: fix slow start regression after fix attempt
    - BUG/MAJOR: server: weight calculation fails for map-based algorithms
    - BUG/MINOR: backend: fix target address retrieval in transparent mode
    - BUG/MEDIUM: stick: completely remove the unused flag from the store entries
    - BUG/MEDIUM: stick-tables: complete the latest fix about store-responses
    - BUG/MEDIUM: checks: tracking servers must not inherit the MAINT flag
    - BUG/MINOR: stats: report correct throttling percentage for servers in slowstart
    - BUG/MINOR: stats: correctly report throttle rate of low weight servers
    - BUG/MINOR: checks: successful check completion must not re-enable MAINT servers
    - BUG/MEDIUM: stats: the web interface must check the tracked servers before \ 
enabling
    - BUG/MINOR: channel: initialize xfer_small/xfer_large on new buffers
    - BUG/MINOR: stream-int: also consider ENOTCONN in addition to EAGAIN
    - BUG/MEDIUM: http: don't start to forward request data before the connect
    - DOC: fix misleading information about SIGQUIT
    - BUILD: simplify the date and version retrieval in the makefile
    - BUILD: prepare the makefile to skip format lines in SUBVERS and VERDATE
    - BUILD: use format tags in VERDATE and SUBVERS files