Further unixd hacks to remove duplication between old-unixd and mod_unixd,

and get it working with old MPMS[1] + mod_unixd.  It's still an uneasy
split, as some modules (mod_cgid, suexec)[2] also use unixd.
More thinking+hacking due.

[1] Should be prefork/worker/event, but only worker is tested.
[2] cgid is OK, suexec is untested.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@711146 13f79535-47bb-0310-9956-ffa450edef68