Refine README for SRS3

README.md

@@ -5,8 +5,8 @@
 [![](https://codecov.io/gh/ossrs/srs/branch/3.0release/graph/badge.svg)](https://codecov.io/gh/ossrs/srs/branch/3.0release)
 [![](https://cloud.githubusercontent.com/assets/2777660/22814959/c51cbe72-ef92-11e6-81cc-32b657b285d5.png)](https://github.com/ossrs/srs/wiki/v1_CN_Contact#wechat)
 
-SRS/3.0，[OuXuli][release3]，是一个流媒体集群，支持RTMP/HLS/WebRTC/SRT/GB28181，高效、稳定、易用，简单而快乐。<br/>
-SRS is a RTMP/HLS/WebRTC/SRT/GB28181 streaming cluster, high efficiency, stable and simple.
+SRS/3.0，[OuXuli][release3]，是一个流媒体集群，支持RTMP/HLS/FLV，高效、稳定、易用，简单而快乐。<br/>
+SRS is a RTMP/HLS/FLV streaming cluster, high efficiency, stable and simple.
 
 > Remark: Although SRS is licenced under [MIT][LICENSE], but there are some depended libraries which are distributed using their own licenses, please read [License Mixing][LicenseMixing].