unify sys.exit() calls
unify sys.exit() calls

bastimeyer/streamlink,streamlink/streamlink,javiercantero/streamlink,javiercantero/streamlink,chhe/streamlink,melmorabity/streamlink,bastimeyer/streamlink,beardypig/streamlink,streamlink/streamlink,back-to/streamlink,gravyboat/streamlink,gravyboat/streamlink,back-to/streamlink,wlerin/streamlink,melmorabity/streamlink,wlerin/streamlink,beardypig/streamlink,chhe/streamlink