Firewall management on install

[jhawkwind]

Automate these commands upon install:

firewall-cmd --new-service=factorio-multiplayer --permanent
firewall-cmd --service=factorio-multiplayer --description="Factorio multi-player lock step sychronization replication protocol" --permanent
firewall-cmd --service=factorio-multiplayer --add-port=34197/udp --permanent
firewall-cmd --add-service=factorio-multiplayer --permanent
firewall-cmd --reload