graphics/feh: Update to 3.10 (+)
Changes:
- Add tests: All tests successful (Files=2, Tests=74. Result: PASS)
- Remove USES=compiler:c++11-lang as it should no longer be necessary for building on powerpc64
- Pet portclippy, portfmt, and portlint
Upstream changes:
- Add --sort=none option to un-set sort modes specified earlier
- Improve error messages for Imlib2 ≥ 1.8
- Fix build with clang 16
- Fix tests when building with magic=1
Sponsored by: The FreeBSD Foundation