Since wsmux is currently designed to act as a N inputs : 1 output device, be more coherent when handling the attachment of output devices (displays): - on attach, only claim the mux output if it has none already; - on detach, only force detachment from the input devices from this display   if we are the mux output.
Since wsmux is currently designed to act as a N inputs : 1 output device,
be more coherent when handling the attachment of output devices (displays):
- on attach, only claim the mux output if it has none already;
- on detach, only force detachment from the input devices from this display
  if we are the mux output.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars