On the 'SVNParentPathTemplate' branch: Avoid using %s and
apr_psprintf().  Rather, do proper substitution of "%{SERVER_NAME}".

* subversion/mod_dav_svn/mod_dav_svn.c
  (dir_conf_t): Comment tweak for line length.
  (merge_dir_config): Wrap long line.
  (dav_svn__get_fs_parent_path): Rewrite substitution mechanism around
    svn_stringbuf_replace().

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/SVNParentPathTemplate@1511457 13f79535-47bb-0310-9956-ffa450edef68