Fixed MPEG-DASH playback and MPD validity.
Fixed MPEG-DASH playback and MPD validity.

PROGrand/nginx-rtmp-module,arut/nginx-rtmp-module,PROGrand/nginx-rtmp-module,Ivip/nginx-rtmp-module,doogaille/nginx-rtmp-module,arut/nginx-rtmp-module,DavadDi/nginx-rtmp-module,doogaille/nginx-rtmp-module,arut/nginx-rtmp-module,Ivip/nginx-rtmp-module,arut/nginx-rtmp-module,Ivip/nginx-rtmp-module,PROGrand/nginx-rtmp-module,Ivip/nginx-rtmp-module,doogaille/nginx-rtmp-module,doogaille/nginx-rtmp-module,DavadDi/nginx-rtmp-module,PROGrand/nginx-rtmp-module,PROGrand/nginx-rtmp-module,DavadDi/nginx-rtmp-module