fix the example dvr config file error
fix the example dvr config file error

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