update readme

README.md

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 ==================
 
 SRS(SIMPLE RTMP Server) over state-threads created in 2013.<br/>
-SRS is a simple, RTMP/HLS, high-performance, single(plan)/multiple processes, edge(plan)/origin live server.<br/>
+SRS is a simple, RTMP/HLS, high-performance, single/multiple(plan) processes, edge(plan)/origin live server.<br/>
 SRS supports [vhost](https://github.com/winlinvip/simple-rtmp-server/wiki/RtmpUrlVhost), rtmp(encoder push, client/edge pull), ingester(srs pull), [HLS](https://github.com/winlinvip/simple-rtmp-server/wiki/DeliveryHLS), [transcoding](https://github.com/winlinvip/simple-rtmp-server/wiki/FFMPEG), [forward](https://github.com/winlinvip/simple-rtmp-server/wiki/FFMPEG), [http hooks](https://github.com/winlinvip/simple-rtmp-server/wiki/HTTPCallback). <br/>
 Blog: [http://blog.csdn.net/win_lin](http://blog.csdn.net/win_lin) <br/>
 See also: [https://github.com/winlinvip/simple-rtmp-server](https://github.com/winlinvip/simple-rtmp-server) <br/>