Default Gamepad binds on Linux/FreeBSD

Currently the default joy_axis* cvar values seem to not work properly with XBox 360 and PS4 gamepads on Linux and FreeBSD. These values seem to work: joy_axisforward 1 joy_axispitch 4 joy_axisside 0 joy_axisup -1 joy_axisyaw 3

Additionally the joy_x360* cvars don't seem to have any effect on Linux. I expect them to be either Windows specific or no longer needed (maybe SDL2 properly abstracts that away), so I'd really appreciate some feedback from Windows users here.

Before I create a MR for this, I'd like to know what settings are needed for other OSs/gamepads.