Changed function names to describe their implementation better.

* subversion/libsvn_repos/authz.c
  (authz_get_any_access): Renamed from authz_get_global_access,
                          Added an explanatory comment.

  (authz_get_any_access_parser_cb): Renamed from authz_global_parse_section

Patch by: Arwin Arni <arwin{_AT_}collab.net>