WinNT MPM: crash-o-matic with "Listen <portnumber> <unrecognized>"

trunk patch: http://svn.apache.org/r1520368

Submitted by: trawick
Reviewed by: covener, humbedooh


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1523261 13f79535-47bb-0310-9956-ffa450edef68