[WEB-3676] help.minecraft.net footer uses HTTP links and outdated links

The footer of the help.minecraft.net pages uses HTTP instead of HTTPS links and contains outdated links to mojang.com.
Note that it is also not in sync with the minecraft.net footer.

HTTP links

"About": http://mojang.com/about/
"Games": http://mojang.com/games/
"Privacy and cookies": http://go.microsoft.com/fwlink/?linkid=521839
"Terms of use": http://go.microsoft.com/fwlink/?linkid=206977
"Trademarks": http://www.microsoft.com/trademarks
"About our ads": http://choice.microsoft.com/

Outdated links

"About": http://mojang.com/about/
Redirects to minecraft.net
"Games": http://mojang.com/games/
Redirects to minecraft.net
Mojang Studios logo: https://mojang.com/?ref=ft
Redirects to minecraft.net