update readme for hls(h.264+mp3).

@@ -484,6 +484,8 @@ Supported operating systems and hardware:
 [CN](https://github.com/winlinvip/simple-rtmp-server/wiki/v2_CN_DeliveryHttpStream),
 [EN](https://github.com/winlinvip/simple-rtmp-server/wiki/v2_CN_DeliveryHttpStream)
 ).
+1. Support HLS(h.264+mp3) streaming, read 
+[#301](https://github.com/winlinvip/simple-rtmp-server/issues/301).
 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