*) Added new ap_register_cleanup_ex() API function which allows

     for a "magic" cleanup function to be run at register time
     rather than at cleanup time. Also added the
     ap_note_cleanups_for_(socket|fd|file)_ex() API functions
     which allows for control over whether that magic cleanup
     should be called or not. This does not change the default
     behavior of the non-"ex" function (eg: ap_register_cleanup).
     At present, the magic cleanup is simply code that performs
     a CLOSEXEC, but that can be modified (hmmm... maybe an
     API issue?)

PR:
Obtained from:
Submitted by:
Reviewed by:	Martin


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@97798 13f79535-47bb-0310-9956-ffa450edef68