Feature request: add option to prepend stream url with stream protocol.

[ReenigneArcher]

Please add a boolean option to prepend a stream url with the the stream protocol in the m3u.

For example it would make http://localhost:8000/video?channel=101 become httpstream://http://localhost:8000/video?channel=101

Changing the url's to this allows the streams to be played in clients/applications which may need this to determine the type of stream. Streamlink (https://github.com/streamlink/streamlink) is an example of such a program.

Here is the difference when trying to use dizquetv streams with streamlink.

>streamlink https://github.com/streamlink/streamlink best
error: No plugin can handle URL: https://github.com/streamlink/streamlink

>streamlink httpstream://http://localhost:8000/video?channel=101 best
[cli][info] Found matching plugin http for URL httpstream://http://localhost:8000/video?channel=101
[cli][info] Available streams: live (worst, best)
[cli][info] Opening stream: live (http)
[cli][info] Starting player: "C:\Program Files\VideoLAN\VLC\vlc.exe"