Update to version 5.10

PR:		194688
Submitted by:	maintainer
- bsd-user: deal with new sem_wait2 and sem_wake2 syscalls in head.
- Bump PORTREVISION.

Submitted by:	sbruno
Obtained from:	https://github.com/seanbruno/qemu-bsd-user/commit/2478a4e4a33d0523cc436eabb4a27b258b4358b8
- Update to version 6.2.8
- Remove uneeded bsd.port.options.mk inclusion by using BROKEN_* vars

PR:		194164
Submitted by:	tkato432@yahoo.com
Do not hide stdout from users by sending it to syslog. Users need to be
able to readily view errors if they happen at startup.

PR:		193378