hud_speed_show # as default + add variations to options menu

[scaryguy334]

Heard suggestion from some people getting into it that perhaps enabling of speed on the hud should be on by default?
At the very least perhaps could be added as a option in the menu

Perhaps also FO's own custom fo_hud speed element so it could be moved around using the editor or turned off/on there too?

[drzel]

Yeah I agree I think this should be on, easy enough to make engine one on by default and an option in the menu. Moving to fte-config.