Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE
cycle.

Prune svn:mergeinfo from the new branch, and rename it to RC1.

Update __FreeBSD_version.

Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and
the dvd1.iso packages population.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

strict kobj sigs: fix assortment of device_detach and device_shutdown impls

with common issue of having void return type instead of int

Reviewed by: imp, current@
Approved by: jhb (mentor)

- Add PCI support (Adaptec AHA-2920/A,Future Domain TMC-18XX/3260).
- Reduce duplicated code.

PR: 50427
Submitted by: Bob Bishop <rb@gid.co.uk>