core: fix SymlinksIfOwnerMatch checking:

  (1) Fix Origin checking (PR 36783 - Robert L Mathews)
  (2) Check ownership if both FollowSymlinks and SymlinksIfOwnerMatch are set


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@632947 13f79535-47bb-0310-9956-ffa450edef68