Another subprocess for vmd(8)

Dave Voutila (dv@) has continued his work on moving vmd(8) to a multi-process model. (Undeadly first reported on this in 2023.) This time the virtio scsi device has been converted to a subprocess:

CVSROOT:	/cvs
Module name:	src
Changes by:	dv@cvs.openbsd.org	2026/02/22 15:54:54

Modified files:
	usr.sbin/vmd   : vioscsi.c virtio.c virtio.h vmd.c vmd.h 

Log message:
vmd(8): convert virtio scsi device to a subprocess.

Break the virtio scsi device (used as a cd-rom drive) into a
subprocess like the virtio block and network devices. This leaves
only the entropy device (viornd) and vmmci device running in-process
with the vcpus.

ok mlarkin@