i18n: consistency tweaks

- Replace http by https
- Add Special:MyLanguage

Spotted by Siebrand
https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Ogg-no-player/en
https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Ogg-no-xiphqt/en

Change-Id: I6a232c237a9afe516a68e2e8a3ed9b16c2811994