Merge r579425 from trunk:

mod_log_config: Add format options for %p so that the actual local
or remote port can be logged.  

PR:  43415
Submitted by: Adam Hasselbalch Hansen <ahh@one.com>
Extensively commented on and/or modified by Ruediger Pluem and Jeff Trawick



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@654348 13f79535-47bb-0310-9956-ffa450edef68