plugins.ustreamtv: Fix PS4 channels not returning all streams.
plugins.ustreamtv: Fix PS4 channels not returning all streams.

For some reason these channels refuse our connection
unless a special hostname format is used.

derrod/livestreamer,gtmanfred/livestreamer,gravyboat/streamlink,mmetak/streamlink,programming086/livestreamer,fishscene/streamlink,wolftankk/livestreamer,ethanhlc/streamlink,blxd/livestreamer,chrippa/livestreamer,beardypig/streamlink,okaywit/livestreamer,bastimeyer/streamlink,hmit/livestreamer,lyhiving/livestreamer,Masaz-/livestreamer,javiercantero/streamlink,derrod/livestreamer,caorong/livestreamer,flijloku/livestreamer,programming086/livestreamer,Saturn/livestreamer,gtmanfred/livestreamer,flijloku/livestreamer,Feverqwe/livestreamer,blxd/livestreamer,Saturn/livestreamer,javiercantero/streamlink,intact/livestreamer,streamlink/streamlink,Klaudit/livestreamer,Dobatymo/livestreamer,lyhiving/livestreamer,wlerin/streamlink,chrippa/livestreamer,charmander/livestreamer,okaywit/livestreamer,wolftankk/livestreamer,streamlink/streamlink,ethanhlc/streamlink,back-to/streamlink,chhe/livestreamer,chhe/livestreamer,mmetak/streamlink,caorong/livestreamer,hmit/livestreamer,Klaudit/livestreamer,fishscene/streamlink,jtsymon/livestreamer,Masaz-/livestreamer,melmorabity/streamlink,melmorabity/streamlink,bastimeyer/streamlink,chhe/streamlink,chhe/streamlink,back-to/streamlink,intact/livestreamer,sbstp/streamlink,sbstp/streamlink,Dobatymo/livestreamer,Feverqwe/livestreamer,charmander/livestreamer,gravyboat/streamlink,wlerin/streamlink,beardypig/streamlink,jtsymon/livestreamer