OS/2 EMX library's select() isn't thread safe so bypass it and go direct to

the OS/2 API call. Unfortunately this only works on socket handles which will
break probe_writable_fds() so I'll have to find a way to fix that too.

Submitted by:	Brian Havard


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@83796 13f79535-47bb-0310-9956-ffa450edef68