Expect ELOOP on Darwin/Linux with "O_NOFOLLOW was specified and the target is a
symbolic link" case. Assume EMLINK on the rest of the OSes (FreeBSD, Solaris,
etc)

MFC after: 2 weeks
X-MFC with: r272057
Sponsored by: EMC / Isilon Storage Division
Fix the executed testplan count

MFC after: 2 weeks
X-MFC with: r272057
Sponsored by: EMC / Isilon Storage Division
Add myself (jch) to calendar.freebsd and committers-src.dot

Approved by:	jhb (mentor)
Finish QCOW version 2 and stop making it conditional.

We have a different ordering for the RC block(s) and L2 tables.
This is expected to be a non-issue, because everything is found
through file offsets in the corresponding RC table and L1 table.
Files that grow organically have RC blocks and L2 tables scattered
all over the place anyway.

The reason for the difference is that mkimg needs to be able to
write to a pipe. We can't seek forward and backward to fill in
the bits in non-sequential order.
Increase the memory disk size in the following testcases to avoid mount
failures, which would cause cascade failures in the rest of the test
run:

link/15.t, open/19.t, mkdir/11.t, mkfifo/11.t, symlink/11.t

Fail quickly in all of the testcases if mdconfig, mount, umount, etc
fails to avoid issues similar to this in the future

Submitted by: Casey Peel <cpeel@isilon.com>
MFC after: 2 weeks
X-MFC with: r272057
Sponsored by: EMC / Isilon Storage Division
Add baseline files for QCOW2.
Fix NULL pointer deref in ipfw when using dummynet at layer 2.
Drop packet if pkg->ifp is NULL, which is the case here.

ref. https://github.com/HardenedBSD/hardenedBSD
commit 4eef3881c64f6e3aa38eebbeaf27a947a5d47dd7

PR 193861 --  DUMMYNET LAYER2: kernel panic

in this case a kernel panic occurs. Hence, when we do not get an interface,
we just drop the packet in question.

PR:		193681
Submitted by:	David Carlier <david.carlier@hardenedbsd.org>
Obtained from:	Hardened BSD
MFC after:	2 weeks
Relnotes:	yes
Merge remote-tracking branch 'freebsd/master' into hardened/current/master
Merge remote-tracking branch 'freebsd/master' into hardened/current/hardening
Merge remote-tracking branch 'freebsd/master' into hardened/current/segvguard
Merge remote-tracking branch 'freebsd/master' into hardened/current/ptrace
Merge remote-tracking branch 'freebsd/master' into hardened/current/log
Merge remote-tracking branch 'freebsd/master' into hardened/current/userlandenhanced
Merge branch 'hardened/current/master' into hardened/current/unstable
Merge branch 'hardened/current/hardening' into hardened/current/unstable
Merge branch 'hardened/current/segvguard' into hardened/current/unstable
Merge branch 'hardened/current/ptrace' into hardened/current/unstable
Merge branch 'hardened/current/log' into hardened/current/unstable
Merge branch 'hardened/current/userlandenhanced' into hardened/current/unstable