* subversion/include/svn_cache_config.h
  (svn_cache_config_t): Add docstrings telling the devs to not extend
                        this structure.  No functional change.

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1547135 13f79535-47bb-0310-9956-ffa450edef68