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

Force re-routing PCI interrupts (this is for legacy INTx not MSI).
Need this for gem5, but was not needed on real hadrware (yet) as it
was always MSI.

Reviewed by: andrew, jhb
Discovered by: andrew
Sponsored by: DARPA/AFRL
Differential Revision: https://reviews.freebsd.org/D5494

Increase MAXCPU in ARM64

Increase MAXCPU number to the maximum known value the existing
hardware can support.

Obtained from: Semihalf
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3405

Introduce ITS support for ARM64

Add ARM ITS (Interrupt Translation Services) support required
to bring-up message signalled interrupts on some ARM64 platforms.

Obtained from: Semihalf
Sponsored by: The FreeBSD Foundation

We will have fueword on arm64, mark as such in machine/param.h.

Sponsored by: The FreeBSD Foundation

Add the start of the arm64 machine headers. This is the subset needed to
start getting userland libraries building.

Reviewed by: imp
Sponsored by: The FreeBSD Foundation