Add a usable nuclear charge to every map

[GARGATHUGANOKSREVENG]

make needing to set off the nuke require some key that only the authentication disk has

I don't like nerfs but I can at the very least agree to this. BUT. Make sure it's just the headpass. I think that'd work since if you're tampering with the same tools you need, to plant a nuclear charge on the station, spoofing SU and packet sniffing for the headpass makes enough sense. It IS a bit ridiculous that it's more technically in-depth to call a shuttle or transmit messages to centcom than it is to arm a nuclear charge.

Otherwise adding a self destruct sequence to every map is something I fully support because it is awesome and badass.