Add syscall writing to the console without any notification

[aufau]

It was requested for cgame chat (like in jka). Check if Bucky's eternaljk doesn't have something similar already.

Effort: Small Difficulty: Medium

[Daggolin]

Solved by https://github.com/mvdevs/jk2mv/commit/13c6a8a7b18d78f45f561f5dfd32621b69fdb969 and https://github.com/mvdevs/jk2mv/commit/8f880996db632ce32e877ef4ce984ae5a2f92c0d.