refine conf, add comments for other listen type

@@ -3,7 +3,6 @@
 # @see full.conf for detail config.
 
 listen              19350;
-chunk_size          65000;
 vhost __defaultVhost__ {
     enabled         on;
     gop_cache       on;

@@ -670,6 +670,7 @@ int SrsConfig::parse_file(const char* filename)
     }
     
     SrsConfDirective* conf = NULL;
+    // check rtmp port specified by directive listen.
     if ((conf = get_listen()) == NULL || conf->args.size() == 0) {
         ret = ERROR_SYSTEM_CONFIG_INVALID;
         srs_error("line %d: conf error, "

@@ -325,7 +325,7 @@ int SrsServer::accept_client(SrsListenerType type, st_netfd_t client_stfd)
     if (type == SrsListenerStream) {
         conn = new SrsClient(this, client_stfd);
     } else {
-        // handler others
+        // TODO: FIXME: handler others
     }
     srs_assert(conn);