As discussed, enable flock serialized accept under freebsd, and a/ux. And

I also enabled it under sunos4, I'm about to go double check that's correct
for sunos4.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@78426 13f79535-47bb-0310-9956-ffa450edef68