x11/xtrans: don't unlink existing UNIX sockets

[jbeich]

Summary

Prevents multiple Xorg/Xwayland/Xephyr/etc instances from trampling each other X11 sockets (e.g., /tmp/.X11-unix/X0) that maybe still in use.

PR: 253277
Submitted by: Olivier Certner (based on)

Test Plan

Builds OK:

• 11.4/12.2/13.0/14.0 aarch64/amd64/i386/armv6/armv7
• All 19 consumers (via freshports list)

Runtime OK:

• Xwayland (via sway)
• Xorg (via startx)

[jbeich]

• Deduplicate PORTREVISION bumps

[zeising]

I would like upstream to at least comment on the MR before we merge it into the FreeBSD ports tree.

[manu]

Mark as request changes so it doesn't shows up in phab in "Must Review" category.

[arrowd]

I have implemented all necessary stuff on the ConsoleKit and SDDM side to make switching users possible. This change is the last piece of puzzle.

[manu]

In D30557#950012, @arrowd wrote:

I have implemented all necessary stuff on the ConsoleKit and SDDM side to make switching users possible. This change is the last piece of puzzle.

Go ahead.