Added psocket() which is a pool form of socket(), various places within

the proxy weren't properly blocking alarms while registering the cleanup
for its sockets.  bclose() now uses pclose() and pclosesocket().  There
was a bug where the client socket was being close()d twice due a still
registered cleanup.

A few cleanups were made to reduce unneeded time() and getpid() calls.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@78861 13f79535-47bb-0310-9956-ffa450edef68