linux kernel hackers indicated that it was time

for apache to drop the serialisation on linux; and a
switch to sysv semaphores is preferred for performance.
see <Pine.LNX.4.21.0011041233550.1897-100000@twinlark.arctic.org> in
new-httpd archive for more details.

Submitted by:	Andrew Morton <andrewm@uow.edu.au>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@86837 13f79535-47bb-0310-9956-ffa450edef68