Change the compile switches for ReliantUNIX SVR4 not to use

Change the compile switches for ReliantUNIX SVR4 not to use
SYSV semaphores, because upon reaching the system limit of
semaphores, the whole server exits (not just one child).
Apache could be improved to use Dean's NO_SEM_UNDO flag (see test/time-sem.c)
which is currently implemented only in the time-sem test program, but not in
apache. Until then, revert to using fcntl() locks.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@89151 13f79535-47bb-0310-9956-ffa450edef68