Improvements suggested by Brian Pane, first assure all OS's get to deal
  with handler 'server-parsed', do the xbithack bit tests before testing
  it's string values (protected against a null point).

  And make it [perhaps] more legible.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92642 13f79535-47bb-0310-9956-ffa450edef68