Security QoL tweaks/hot takes

[Lady Birb]

Riot shotguns are generally regarded as useful, but too dangerous to use on humans. Rubber slugs stun on the first hit, but cause a not insignificant amount of brute damage. Flare shots can set people on fire, which is only really useful against blobs or shambling abominations, and then you can get flamethrowers from the armory's anti-biological crate. As far as I know, you can't get the other shotgun shell types as a non-traitor.