Streams and Countdowns

[hjpalpha]

Currently matches do not accept stream keys in the form of twitch_en_1.

Additionally in Module:Countdown the lines 36-49 are redundant, they do nothing except increase runtime (it processes new keys but pushes them with the same key again into the args table so factually no change accomplished).

And on discord there was the question about allowing >1 stream per platform in match countdowns.

For this we might want to adjust Module:Links/Stream and Module:Countdown as well as MediaWiki:Common.js/Countdown.js

We could do something like:

• https://liquipedia.net/commons/index.php?title=Module%3ACountdown%2Fdev&type=revision&diff=503976&oldid=503648
• https://liquipedia.net/commons/index.php?title=Module%3ALinks%2FStream%2Fdev&type=revision&diff=503660&oldid=503647
• https://secret.liquipedia.net/commons/index.php?title=MediaWiki%3ACommon.js%2FCountdown.js&type=revision&diff=5213&oldid=5176

tests:

• inside match2 on sc2 without js adjusts: https://liquipedia.net/starcraft2/User:Hjpalpha/wip10
• using template countdown on secret commons including js change there (copied the necessary modules over fom normal commons): https://secret.liquipedia.net/commons/User:Hjpalpha
  
  mind the broken logos are because secret commons is "slightly outdated" and are unrelated to my suggested changes

still to be discussed:

• runtime???
• is it wanted?