Add MX Linux

[regret-17]

MX Linux, the sister project to Antix, uses SysV by default as mentioned here.

[muellermartin]

Thanks for the suggestion. I'm maintaining this project more a joke, therefore I don't spent much time on it, but if somebody submits a usable PR, I'm willing to merge it.

[1enify]

if somebody submits a usable PR, I'm willing to merge it.

A bit "bloated" in that way, but I created one: #63