seatd

• Do not depend on logind for libseat
• Does it depend on basu?
• Check if we need a service file?
• Do we need chmod u+s (suid) on bin/seatd-launch?
• Group name video vs seat (prefer the former as it already exists)

References

• https://cgit.freebsd.org/ports/tree/sysutils/seatd/files/pkg-message.in
• https://cgit.freebsd.org/ports/tree/sysutils/seatd/Makefile
• https://github.com/openbsd/ports/tree/master/sysutils/seatd/patches