* RESTCONF configuration is unified and moved from clixon-config.yang to clixon-restconf.yang

* Except `CLICON_RESTCONF_DIR` which remains in clixon-config.yang due to bootstrapping
    * -d <dir> option removed
  * This applies to both evhtp and fcgi RESTCONF
    * Both can also read config from backend, and be started from backend
  * You may need to move config as follows (from clixon-config.yang to clixon-restconf.yang)
    * CLICON_RESTCONF_PRETTY -> restconf/pretty
    * CLICON_RESTCONF_PATH -> restconf/fcgi-path

apps/restconf/restconf_stream_fcgi.c

@@ -394,6 +394,7 @@ api_stream(clicon_handle h,
 
     clicon_debug(1, "%s", __FUNCTION__);
     path = restconf_uripath(h);
+    /* XXX see restconf_config_init access directly */
     pretty = clicon_option_bool(h, "CLICON_RESTCONF_PRETTY");
     if ((pvec = clicon_strsep(path, "/", &pn)) == NULL)
 	goto done;