package: haproxy
 - update to 1.4.23 
   -  (CVE-2013-1912)
   -  fixup for consistent hash 
   -  refresh accept-proxy patch



git-svn-id: svn://svn.openwrt.org/openwrt/packages@36337 3c298f89-4303-0410-b956-a3cf2f4a3e73