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

WITH_META_MODE: Resolve SYSDIR to avoid changed build commands.

Sponsored by: EMC / Isilon Storage Division

Eliminate bsd.sys.mk on purpose. Do not put it back.

Unbreak the build for some modules that depend on -std flags to be passed
through via CFLAGS, as noted by Jenkins when building sparc64 by re-adding
bsd.sys.mk to bsd.kmod.mk:
https://jenkins.freebsd.org/job/FreeBSD_HEAD_sparc64/225/changes

Tested with:
% cd /sys/modules/bce; make obj; make depend; make all

Fix module builds on arm (and maybe others) by turning off a whole
raft of new warnings that appear to be on by default in clang 3.5.0.
Fix RPI-B build issues with new clang not liking the ability to pass
arbitrary flags to as, since some flags are more arbitrary (and thus
verboten) than others.

These warnings should be actually fixed in the code, but this is a
band-aide to get things (almost) building again.

Fix comma splice, can't ambiguity and quoting.

Submitted by: bde@
MFC after: 2 weeks

Wordsmith the can't find kernel error message, and suggest which
variable to set to override.

ata module additions now nest ata modules one deeper than any prior module.
Increase heuristic used to find them by one.

Fixed style bugs in previous commit (151 characters of trailing whitespace).

- Missing trailing slash for a kern directory check.
- Check in both places if ${_dir}/conf/kmod.mk exists.
- Style fixes (lines too long).

Submitted by: bde

Check if ${_dir}/kern exists as well, because if it doesn't exists
we will fail later and we can miss good kernel source tree directory.
I found this trying to compile kld module and it finds 'conf/kmod.mk'
in '../..', but it fails later, because there is no 'kern' directory,
but there is valid kernel source tree still in /usr/src/sys/.

Bring in the WARNS directive from NetBSD, localized in a new bsd.sys.mk
to avoid polluting sys.mk. This directive controls the addition of
compiler warning flags to CFLAGS in a relatively compiler-neutral manner.

The idea is that WARNS can be set in Makefile.inc or in individual
Makefiles as they become clean, to prevent the introduction of new
warnings in the code. -Werror is added by default

Do not check for existence of ${_dir}/kern/ , because for modules that set
.PATH to ${.CURDIR}/[...]/kern , the "exists" expression will fail for the
form exists(${.CURDIR}/[...]/kern/). This appears to be happening because
make is searching for the argument to "exists" by using .PATH rather than a
relative search, because .PATH and the argument match at the beginning.
Additionally, make appears to consider a path that starts with ${.CURDIR}
as relative, even though it expands to an absolute path.

The reason that most people aren't seeing this problem is that the absolute
paths of /usr/src/sys and /sys are also searched, so as long as the kernel
source can be found in at least one of those places, no problems surface.
This problem was inadvertently introduced on 1 December 2000, with the
addition of the sysvipc modules.

Add ${.CURDIR}/../../../.. to the list of places we look for the
kernel. The new moudles/sound/drivers/foo pushes us down one more
level.

Sigh. Use the correct path to bsd.conf.mk. It's times like this that I
regret giving up coffee.

Revive a skeleton for bsd.kmod.mk (which will be in the make search path)
that merely locates and includes sys/conf/kmod.mk.