For #299, refine the comments.
For #299, refine the comments.

ossrs/srs,ossrs/srs,ossrs/srs,winlinvip/srs,winlinvip/srs,winlinvip/srs,ossrs/srs,ossrs/srs,winlinvip/srs,ossrs/srs,winlinvip/srs,winlinvip/srs,winlinvip/simple-rtmp-server