update conf.

@@ -367,6 +367,7 @@ vhost http.static.srs.com {
         #       mount to /hls
         #           access by http://ossrs.net:8080/hls/xxx.html
         #           or by http://192.168.1.173:8080/hls/xxx.html
+        # @remark the port of http is specified by http_stream section.
         # default: [vhost]/
         mount       [vhost]/hls;
         # main dir of vhost,