cli: Allow case-insensitive stream name lookup.
cli: Allow case-insensitive stream name lookup.

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