* mod_proxy: Add the possibility to set the worker parameters

     connectiontimeout and ping in milliseconds. 
     Trunk version of patch:
       http://svn.apache.org/viewvc?rev=705005&view=rev
       http://svn.apache.org/viewvc?rev=707022&view=rev
     Backport version for 2.2.x of patch:
       http://people.apache.org/~rpluem/patches/milli_seconds.diff
     +1: rpluem, pgollucci, jim



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@713145 13f79535-47bb-0310-9956-ffa450edef68