Seems Terminal Server flavors were failing global_mutex_init, but it was
  somewhat hard to tell, seeing as we never log any status until we can't
  obtain the mutex.  Lots more rv checking is required in here, would
  appreciate if new/touched code grew the appropriate tests.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@93515 13f79535-47bb-0310-9956-ffa450edef68