Win32: Some cleanup of winnt.c. Retry AcceptEx on failure in preparation for

socket reuse patch. Sometimes the recycled accept socket will not work; need
to handle this case by closing it and obtaining a new one.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85202 13f79535-47bb-0310-9956-ffa450edef68