My [sixth?] major revamp of service.c. Traded an event for a mutex

  My [sixth?] major revamp of service.c.  Traded an event for a mutex
  to the service_init completion, expanded timeouts, moved SERVICE_STOPPED
  message posting to the main thread since sometimes, in odd cirumstances,
  our SCM thread wasn't resumed prior to termination, and ripped the code
  for the stderr logs to use nt_eventlog.c instead.  And generally tried
  to make the code just a little bit more grokable [as if such a thing
  is really possible.]

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@93928 13f79535-47bb-0310-9956-ffa450edef68