MFC r273359:
  It seems multicast filtering of RTL8168F does not work.  Workaround
  the silicon bug by accepting any multicast packets.

  PR:	193488
MFC r273370:
Correct the calculation of tcps_rto in the struct tcpcb -> tcpsinfo_t
translator.
MFC r273638:
Revert somewhat hackish geom_disk optimization, committed as part of r256880,
and the following r273143 commit, supposed to workaround introduced issue by
quite innocent-looking change.

While there is no clear understanding why, but r273143 is accused in data
corruption in some environments with high I/O load.  I personally don't see
any problem in that commit, and possibly it is just a trigger to some other
bug somewhere, but better safe then sorry for now.

Requested by:	scottl@
MFC r273457: Document sort_io_queue sysctls/tunables.
MFC r273666.
Don't pass the 'error' return from an I/O port handler directly to vm_run().
MFC: r273704

Fix CF ERASE breakage caused by 268205.

Sponsored by:	Multiplay
MFC r261271:

  Ressurect the local change documenting
  authpf's requirement for a mounted fdescfs(5).

PR:		docs/186250
MFC r272746:
  Add an ability to set dumpdev via loader(8) tunable.

MFC r272747:
  Revert r156046. We support setting dumpdev via loader tunable again.
  Also change default disk name to ada.
MFC r269956:

 From https://sourceware.org/ml/newlib/2014/msg00113.html
 By Richard Earnshaw at ARM
 >
 >GCC has for a number of years provides a set of pre-defined macros for
 >use with determining the ISA and features of the target during
 >pre-processing.  However, the design was always somewhat cumbersome in
 >that each new architecture revision created a new define and then
 >removed the previous one.  This meant that it was necessary to keep
 >updating the support code simply to recognise a new architecture being
 >added.
 >
 >The ACLE specification (ARM C Language Extentions)
 >(http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.set.swdev/index.html)
 >provides a much more suitable interface and GCC has supported this
 >since gcc-4.8.
 >
 >This patch makes use of the ACLE pre-defines to map to the internal
 >feature definitions.  To support older versions of GCC a compatibility
 >header is provided that maps the traditional pre-defines onto the new
 >ACLE ones.

 Stop using __FreeBSD_ARCH_armv6__ and switch to __ARM_ARCH >= 6 in the
 couple of places in tree. clang already implements ACLE. Add a define
 that says we implement version 1.1, even though the implementation
 isn't quite complete.
MFC r273284:

 Allow libkvm to get the kernel va to pa delta without the need for
 physaddr. This should allow for a kernel where PHYSADDR and KERNPHYSADDR
 are both undefined.

 For now libkvm will use the old method of reading physaddr and kernaddr
 to allow it to work with old kernels. This could be removed in the future
 when enough time has passed.
MFC r273287:

 Only build the ARM tranpoline when KERNPHYSADDR is defined as it is
 otherwise unneeded in armv6 kernels.
MFC r273288:

 Allow the armv6 kernel to be build with PHYSADDR undefined. The kernel
 will now find the virtual to physical mapping for libkvm to use at
 runtime. This makes PHYSADDR redundant, however keep it around to give
 everyone a chance to update their libkvm.
MFC r271539,273003,273005:

Add ZFS support to the bsdinstall partition editor and sade

Submitted by:	Kurt Lidl (original version)
MFC r272720, 273061, 273062, 273063, 273064

Implement PLPMTUD blackhole detection (RFC 4821), inspired by code
from xnu sources.  If we encounter a network where ICMP is blocked
the Needs Frag indicator may not propagate back to us.  Attempt to
downshift the mss once to a preconfigured value.

Note, this is turned off by default.
MFC r264628: fcntl.h: Make visible various POSIX.1-2008 features.

Also, remove #if __BSD_VISIBLE where it is redundant. When __BSD_VISIBLE is
defined to 1, __POSIX_VISIBLE, __XSI_VISIBLE and __ISO_C_VISIBLE are also
defined to the newest supported version.

PR:		188173
MFC r266842: netinet/in.h: Expose htonl(), htons(), ntohl() and ntohs() in
strict POSIX mode.

Put the htonl(), htons(), ntohl() and ntohs() declarations under
__POSIX_VISIBLE >= 200112. POSIX.1-2001 and newer require these to be
exposed from <netinet/in.h> (as well as <arpa/inet.h>).

Note that it may be unnecessary to check __POSIX_VISIBLE >= 200112 because
older versions of POSIX and the C standard do not define this header.
However, other places in the same file already perform the check.

PR:		188316
Submitted by:	Christian Neukirchen
MFC r273733, r273740 and r273773:

The SYSCTL data pointers can come from userspace and must not be
directly accessed. Although this will work on some platforms, it can
throw an exception if the pointer is invalid and then panic the kernel.

Add a missing SYSCTL_IN() of "SCTP_BASE_STATS" structure.

Sponsored by:	Mellanox Technologies
MFC r272770:
  When tunneling interface is going to insert mbuf into netisr queue after stripping
  outer header, consider it as new packet and clear the protocols flags.

  This fixes problems when IPSEC traffic goes through various tunnels and router
  doesn't send ICMP/ICMPv6 errors.

PR:		174602
Sponsored by:	Yandex LLC
MFC r273159:
Add two sysctl(8) to enable/disable NFSv4 server to check when setting
user nobody and/or setting group nogroup as owner of a file or directory.
Usually at the client side, if there is an username that is not in the
client's passwd database, some clients will send 'nobody@<your.dns.domain>'
in the wire and the NFSv4 server will treat it as an ERROR.
However, if you have a valid user nobody in your passwd database,
the NFSv4 server will treat it as a NFSERR_BADOWNER as its believes the
client doesn't has the username mapped.

Submitted by:	Loic Blot <loic.blot@unix-experience.fr>
Reviewed by:	rmacklem
Approved by:	rmacklem
Sponsored by:	QNAP Systems Inc.
MFC r273593:

Update the network interface baudrate integer according to the actual
line rate.

Sponsored by:	Mellanox Technologies