Allow Hunter spawns for RP servers

[Solenoid]

I think more killing antags on RP could be cool, especially ones which mesh well into the pre-existing RP strategy to do the killing stealthily. I personally feel like RP antags can sometimes feel pretty powerless depending on the sec team and the gear and abilities they get, so having a more high power but midround antag to increase the lethality during some rounds would be neat.

Something like the werewolf didn't work because it was too "cute", and was too rampagey, but I think the hunter would work fine since I don't see anyone trying to befriend them seriously. Plus, as Kotlol mentioned, having an antag who can show up and shake up the round could be cool and encourage antags to pivot.