Slash Comand for Exit Mission?

Could have sworn I had seen one of these in the past, was it my imagination or just inability to find?

I found it on wiki.

/requestexitmission
and this to exit the actual game: /quit

It's mentioned in the online help in the game as well...

I just get Unknown command when I use it.

Try this: /requestexitmission 1 or /requestexitmission1