Lower minimum speed limiter speed to 5 km/h (#5065)

* Update fnc_speedLimiter.sqf

* No minimum speed needed anymore

Minimum speed limit of 10 km/h was needed in the past due to engine limitations. Multiple user tests have shown that the minimum speed is not needed anymore. The new minimum of 0 km/h allows for example setting walking speed for vehicles (<10 km/h).

* Change minimum required speed for speed limiter to 3 km/h

To avoid problems with negative speeds (driving backwards) and zero speed, the current change switches from 10 km/h minimum speed to 3 km/h minimum speed. This seems to be the optimal solution to allow all relevant speeds including walking speed.

* Changed minimum required speed to 5 km/h

Officially the minimum required speed is 10 km/h in the master. Lower minimum needed to set car speed to walking speed of accompanying soldiers. Problems have been reported with 3 kmh/ using cars like ATVs.  Thus the new commit is set to 5 km/h minimum speed. Not tested with ATVs yet.

addons/vehicles/functions/fnc_speedLimiter.sqf

@@ -28,7 +28,7 @@ if (GVAR(isSpeedLimiter)) exitWith {
 playSound "ACE_Sound_Click";
 GVAR(isSpeedLimiter) = true;
 
-private _maxSpeed = speed _vehicle max 10;
+private _maxSpeed = speed _vehicle max 5;
 
 [{
     params ["_args", "_idPFH"];