Use the APR's new OS-specific proc mutex accessors -- they are used

here to set permissions on SysV Semaphores. MPMs will be modified to
call this new function as they are ported to the new APR lock API.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@91579 13f79535-47bb-0310-9956-ffa450edef68