Proposed commit message:
```
x11/libxkbcommon: update to 1.2.1
- Add USE_LDCONFIG per portlint [1]
- Add EVDEV option for `xkbcli interactive-evdev` [1]
- Add WAYLAND option for `xkbcli interactive-wayland`
- Simplify OSVERSION check to avoid bsd.port.pre.mk (and bsd.port.options.mk)
Changes: https://github.com/xkbcommon/libxkbcommon/compare/xkbcommon-1.1.0...xkbcommon-1.2.1
Reported by: portscout
PR: 254583 [1]
Submitted by: Evgeniy Khramtsov <2khramtsov@gmail.com> [1]
Approved by: <someone here>
xDifferential Revision: <this review>
```
Should I replace `Submitted by` (FreeBSD style) with `Co-authored-by` (Linux style) in order to let GitHub better track attribution?
If desired I can split into multiple commits but then Phabricator would get in the way by requiring to create separate differentials. Better move #x11 reviews to GitHub or Gitea (e.g., codeberg) but not GitLab (UI is too slow).