packages.pbs: Closing stdin here breaks .wait().
stream.rtmpdump: Saner exception handle.
plugins.youtube: Use the API instead of extracting the config from the HTML.
plugins.afreeca: Use iOS Safari user-agent.
plugins.youtube: Stop attempting to decrypt the signature.

It seems to have stopped working some time ago and decrypting
the signature looks very complicated now, use youtube-dl for
protected videos.