oxidize: Add an option to automatically stop playback after ending the stream

[pavelpilar]

Add an option to handle the currently unhandled "host_on" notice by stopping playback.

INFO oxidize::irc - unhandled notice w/ msg_id: "host_on": Message { tags: None, prefix: Some(ServerName("tmi.twitch.tv")), command: NOTICE("#programator_", "Now hosting Streamer.") }