Support unix-based X11 server connections as well as TCP-based ones #456
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Typically, on unix systems, local X11 is connected through the socket
/tmp/.X11-unix/X0
, as indicated by the missing host name part inDISPLAY=:0
orDISPLAY=:0.0
. WSLg (the X11 implementation provided with WSL in Microsoft Windows) does not listen on the TCP socket localhost:6000, but on the Unix socket only.So this pull request enables SSH X11 forwarding to connect to the unix domain socket if the X server host name is set to the empty string.