Client listening natives

[ConnorMcLeod]

Rather than having to hook FM_SetClientListening, or more usefull then engine natives : native that allow to set if playerA can hear playerB, that's all and can allow all settings.

2 ways : set_user__(index, playersMask) or set_user__(index, playerB, true/false)

Both methods have cons, mask need to retrieve value first, second one need to call few times the native for some specific stuff. I think second way is better.

[joropito]

Maybe both methods with preference on second.

For example:

voice mask to player A voice flag to player A from B

then: player A uses mask for all players except from player B

another native to clear settings will be useful

[joropito]

Should we use groupinfo way like in semiclip? Did it work with voice? If we use it in same way we can avoid to add a lot more code.