Update listener code. Workaround stupid WIN32 bug(?) in WSASocket (fails with 10091 if the process

environment block is not fully inherited from the parent). Start working on I/O layering support.
It's time to make this thing serve a page. Waiting to check-in iol_file and iol_socket...


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@83667 13f79535-47bb-0310-9956-ffa450edef68