Readd the police hat, renamed to guard hat

[Angel]

When the police uniform got renamed to guard uniform, it seems the police hat was removed from the security clothing vendor. I don't see why we can't just keep the hat as well and just rename it too like the uniform.

[Azurnite]

I would like it to be re-added as 'guard hat' in the security vendor as well. I was rather shocked to see it gone. I believe it was repurposed to be the mail courier hat, but I thought they already had the hat prior to the renaming recently.

[Tarmunora]

The police hat was literally just a rename of the mailman hat, and with Mail Courier as a full-time station job, security no longer gets to steal their look.