Fix a memory bug: using pool memory after clear.

* subversion/libsvn_repos/authz.c
  (authz_retrieve_config_repo): Allocate result in result pool.
  (authz_retrieve_config): Typo in docstring.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1447947 13f79535-47bb-0310-9956-ffa450edef68