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

CALLOUT_MPSAFE has lost its meaning since r141428, i.e., for more than ten
years for head. However, it is continuously misused as the mpsafe argument
for callout_init(9). Deprecate the flag and clean up callout_init() calls
to make them more consistent.

Differential Revision: https://reviews.freebsd.org/D2613
Reviewed by: jhb
MFC after: 2 weeks

Mechanically convert to if_inc_counter().

Use define from if_var.h to access a field inside struct if_data,
that resides in struct ifnet.

Sponsored by: Nginx, Inc.

More BUS_PROBE_NOWILDCARD sweeping. Some devices here (if_ath_ahb and siba)
resist easy conversion since they implement a great deal of their attach
logic inside probe(). Some of this could be fixed by moving it to attach(),
but some requires something more subtle than BUS_PROBE_NOWILDCARD.

Add 32-bit support for Gxemul's oldtestmips machine emulation

Original work by: kan@

Mechanically substitute flags from historic mbuf allocator with
malloc(9) flags in sys/dev.

Use MIPS_PHYS_TO_DIRECT_UNCACHED rather than a homegrown version which is not
compatible with 32-bit kernels.

Correct an error in gxemul_disk_write(). It was issuing the command to
read from rather than write to the emulated disk.

Reviewed by: jmallett

In the gxemul console, check the RB_SERIAL boot flag, and change the
relative priority of the gxemul console in line with its role as a
"seiral console". This allows it to override video console drivers
that might otherwise take precdence, subject to that boot flag.

Sponsored by: DARPA, AFRL

Rename the gxemul console device to "ttyu0" to match the expectations of
the default MIPS /etc/ttys.

Sponsored by: DARPA, AFRL

Add a trivial driver for the GXemul Ethernet device. Probably quite buggy and
certainly non-optimal, but enough for basic networking use.

Requested by: rwatson

Add a driver for the GXemul test machine's disk controller and disk devices.
Prefer it to using an md device in the GXEMUL kernel configuration.

Requested by: rwatson, theraven

Merge a rudimentary gxemul "oldtestmips" port. This consists almost
entirely of one machdep file lifted from the MALTA port, as well as
a low-level console and tty driver for the gxemul debugging console
device (the emulators stdio). As with many low-level embedded and
hypervisor console devices, it is polled only, so we drive TTY I/O
from a callout; we are perhaps a bit too aware of the MIPS physical
maps in order to attach the console before newbus comes to life.

The sample kernel configuration depends on an MD-based root file
system, which is not provided. However, any 64-bit, big-endian
userspace image (such as one generated for MALTA) should work.

This will hopefully be supplemented by additional device drivers for
gxemul-specific hardware simulations from Juli Mallett. We have
found oldtestmips quite useful for testing and improving aspects of
the MIPS port, so it's worth supporting better in FreeBSD.

Requested by: theraven, jmallett
Sponsored by: DARPA, AFRL
MFC after: 3 weeks