Add vendor import for pjdfstest

This vendor import code was obtained from
https://github.com/pjd/pjdfstest/commit/abf03c3a47745d4521b0e4aa141317553ca48f91

Approved by: rpaulo (mentor)
Phabric: D743
Sponsored by: EMC / Isilon Storage Division
- Remove mention of MAP_INHERIT.  It hasn't been implemented for thirteen
  years.
- Remove mention of unimplemented MAP_SWAP.  There are no future plans to
  implement it.

Submitted by:	alc (2)
Explicitly set MAP_PRIVATE to avoid [EINVAL] after r271635.

X-MFC-With:	r271635
Reviewed by:	jhb
The vm_mmap_cdev() explicitely converts absence of both MAP_SHARED and
MAP_PRIVATE flags to MAP_SHARED.  Apparently, some code in tree, in
particular, libgeom, relied on this behaviour, see r271721.  For
regular file types, the absence of the flags is interpreted as
MAP_PRIVATE, and libc nlist used this (fixed in r271723).

Allow the implicit flags for legacy binaries.  Bump __FreeBSD_version
to get the ABI note on new binaries to check for in mmap code.

Remove the test for presence of one of the MAP_ANON, MAP_SHARED or
MAP_PRIVATE flags before fget_mmap().  For MAP_ANON, we already verify
that passed fd == -1.  For fd != -1, test after fget_mmap() (for newer
binaries) covers the case.

Reported by:	bdrewery, pho
Reviewed by:	jhb
Sponsored by:	The FreeBSD Foundation
Remove clean option

MFC after:5 days
Remove clean option

MFC after:5 days
For ECORE_DBG_BREAK_IF() ECORE_BUG() ECORE_BUG_ON() check bxe_debug flag before
printing error message.

MFC after:5 days
Root the lib32 object tree under the overall object tree.

This enables a common root directory for all object files for a given tree,
which eases sharing a common MAKEOBJDIRPREFIX, and cleaning up of object trees.

In particular, one can simply (from the source directory) rm -rf /usr/obj$(pwd)
to destroy all object files for it.  Or to copy/sync files, etc.

Reviewed by:	bdrewery
CR:		https://reviews.freebsd.org/D796
MFC after:	1 month
Sponsored by:	Spectra Logic
Fix a kernel panic when unloading isp(4).

In the current implementation, the isp_kthread() threads never exit.

The target threads do have an exit mode from isp_attach(), but it is
not invoked from isp_detach().

Ensure isp_detach() notifies threads started for each channel, such
that they exit before their parent device softc detaches, and thus
before the module does.  Otherwise, a page fault panic occurs later in:

sysctl_kern_proc
  sysctl_out_proc
    kern_proc_out
      fill_kinfo_proc
        fill_kinfo_thread
          strlcpy(kp->ki_wmesg, td->td_wmesg, sizeof(kp->ki_wmesg));

For isp_kthread() (and isp(4) target threads), td->td_wmesg references
now-unmapped memory after the module has been unloaded.  These threads
are typically msleep()ing at the time of unload, but they could also
attempt to execute now-unmapped code segments.

MFC after:	1 month
Sponsored by:	Spectra Logic
MFSpectraBSD:	r1070921 on 2014/06/22 13:01:17
Add laggproto broadcast, it allows sends frames to all ports of the lagg(4) group
and receives frames on any port of the lagg(4).

Phabric:	D549
Reviewed by:	glebius, thompsa
Approved by:	glebius
Obtained from:	OpenBSD
Sponsored by:	QNAP Systems Inc.
The lagg(4) interface is based on trunk(4) interface from OpenBSD.
The FreeBSD is the only system that has the FEC protocol, that is a simple alias
to loadbalance protocol and does not implement the ancient Cisco FEC standard.

From now on, we remove the fec protocol from the documentation and keep the FEC
code only for compatibility.

Phabric:	D539
Reviewed by:	glebius, thompsa
Approved by:	glebius
Sponsored by:	QNAP Systems Inc.
Remove old comment, we already do 802.1q tagging.

Phabric:	D797
Reviewed by:	kevlo
Approved by:	kevlo
Sponsored by:	QNAP Systems Inc.
r258695 introduces a sanity check for makefs in order to verify that
the minimum image size specified is always less than the maximum
image size. If makefs(1) is invoked specifying minimum image size,
but not maximum one, the program exits with an error. Example:

# sudo -E makefs -M 538968064 -B be /home/davide/disk.img $DESTDIR
makefs: `/home/davide/tftproot/mips' minsize of 538968064 rounded up
to ffs bsize of 8192 exceeds maxsize 0.  Lower bsize, or round the
minimum and maximum sizes to bsize.

Assert then that minsize < maxsize iff maxsize is specified.
This change allows me to build MIPS images using makefs(1) and following
what specified in the wiki again.

Reviewed by:	jmallett, ngie
Revert r271735. The comment is absolutely correct, we do not support 802.1p priority tagging. I got confused with the packet tagged and packet to be tagged.

Spotted by:	glebius
Implement most of timer_{create,settime,gettime,getoverrun,delete}
for amd64/linux32.  Fix the entirely bogus (untested) version from
r161310 for i386/linux using the same shared code in compat/linux.

It is unclear to me if we could support more clock mappings but
the current set allows me to successfully run commercial
32bit linux software under linuxolator on amd64.

Reviewed by:		jhb
Differential Revision:	D784
MFC after:		3 days
Sponsored by:		DARPA, AFRL
Re-gen after r271743 implementing most of
timer_{create,settime,gettime,getoverrun,delete}.

MFC after:		3 days
Sponsored by:		DARPA, AFRL
For consistency with the shared header file (and to avoid confusion
with mbufs normally called *m in one place), rename the function
arguments to "mem".

This is a non-functional change.

Reviewed by:	gnn, eric.joyner intel.com
MFC after:	3 days
- Use NULL instead of 0 for fpcurthread.
- Note the quirk with the interrupt enabled state of the dna handler.
- Use just panic() instead of printf() and panic().  Print tid instead
  of pid, the fpu state is per-thread.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Add if_inc_counter(), a generic method to update ifnet(9) counter
w/o dereferencing the struct.

Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.
While not too late rename if_get_counter_compat() to if_get_counter_default().
The compat counters will go away, but the function will remain in its place,
and in all places where it is going to be called.

Discussed with:	melifaro