[MAP] [Config] Security Officer Scaling @ Round-Start

Intended for high-population servers

Open security officer positions scale with population, between 5 slots at ~40 players to 12 slots at ~96 players

Default coefficient is 8, but may be modified (or disabled) in the config.

Extra lockers will spawn if there aren't enough lockers.
Make it possible to extend other jobs, you will probably want to make a proc for the job datums which sets up the job.