On the authzperf branch:  Use APR's fnmatch functionality instead our own
code for generic pattern checks.

* subversion/libsvn_repos/authz.c
  (normalize_wildcards): No need to normalize ** inside a segment pattern.
  (match_to_next_wildcard,
   match_pattern): Remove our matching code.
  (add_complex_matches): Add missing docstring and call the APR matching code.

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/authzperf@1617148 13f79535-47bb-0310-9956-ffa450edef68