* Event MPM: Rework locking of the timeout_mutex, to never hold it while

          calling blocking operations on the worker queue.
                Trunk version of patch: 
                        http://svn.apache.org/viewvc?view=rev&revision=567852
                                http://svn.apache.org/viewvc?view=rev&revision=574462
                                      2.2.x version of patch:
                                              http://people.apache.org/~pquerna/event-mpm-deadlock.patch    +1: pquerna, jim, rpluem



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@575282 13f79535-47bb-0310-9956-ffa450edef68