update readme

@@ -472,6 +472,9 @@ Supported operating systems and hardware:
 [CN](https://github.com/winlinvip/simple-rtmp-server/wiki/v2_CN_Security),
 [EN](https://github.com/winlinvip/simple-rtmp-server/wiki/v2_EN_Security)
 ).
+1. Support custom dvr path and http callback, read 
+[#179](https://github.com/winlinvip/simple-rtmp-server/issues/179) and
+[274](https://github.com/winlinvip/simple-rtmp-server/issues/274).
 1. [no-plan] Support <500ms latency, FRSC(Fast RTMP-compatible Stream Channel tech).
 1. [no-plan] Support RTMP 302 redirect [#92](https://github.com/winlinvip/simple-rtmp-server/issues/92).
 1. [no-plan] Support multiple processes, for both origin and edge