MFC r264417: realpath(): Properly fail "." or ".." components after
non-directories.

If realpath() is called on pathnames like "/dev/null/." or "/dev/null/..",
it should fail with [ENOTDIR]. Pathnames like "/dev/null/" already failed as
they should.

Also, put the check for non-directories after lstatting the previous
component instead of when the empty component (consecutive or trailing
slashes) is detected, saving an lstat() call and some lines of code.

PR:		82980
MFC r263779

Correct ARP update handling when the routes for network interfaces are
restricted to a single FIB in a multifib system.

Restricting an interface's routes to the FIB to which it is assigned (by
setting net.add_addr_allfibs=0) causes ARP updates to fail with "arpresolve:
can't allocate llinfo for x.x.x.x".  This is due to the ARP update code hard
coding it's lookup for existing routing entries to FIB 0.

sys/netinet/in.c:
	When dealing with RTM_ADD (add route) requests for an interface, use
	the interface's assigned FIB instead of the default (FIB 0).

sys/netinet/if_ether.c:
	In arpresolve(), enhance error message generated when an
	lla_lookup() fails so that the interface causing the error is
	visible in logs.

tests/sys/netinet/fibs_test.sh
	Clear ATF expected error.
MFC changes relating to running multiple interfaces on different fibs but
with addresses on the same subnet.

MFC r266860

Fix unintended KBI change from r264905.  Add _fib versions of
ifa_ifwithnet() and ifa_ifwithdstaddr()  The legacy functions will call the
_fib() versions with RT_ALL_FIBS, preserving legacy behavior.

sys/net/if_var.h
sys/net/if.c
        Add legacy-compatible functions as described above.  Ensure legacy
        behavior when RT_ALL_FIBS is passed as fibnum.

sys/netinet/in_pcb.c
sys/netinet/ip_output.c
sys/netinet/ip_options.c
sys/net/route.c
sys/net/rtsock.c
sys/netinet6/nd6.c
        Call with _fib() functions if we must use a specific fib, or the
        legacy functions otherwise.

tests/sys/netinet/fibs_test.sh
tests/sys/netinet/udp_dontroute.c
        Improve the udp_dontroute test.  The bug that this test exercises is
        that ifa_ifwithnet() will return the wrong address, if multiple
        interfaces have addresses on the same subnet but with different
        fibs.  The previous version of the test only considered one possible
        failure mode: that ifa_ifwithnet_fib() might fail to find any
        suitable address at all.  The new version also checks whether
        ifa_ifwithnet_fib() finds the correct address by checking where the
        ARP request goes.

MFC r264917

Style fixes, mostly trailing whitespace elimination.  No functional change.

MFC r264905

Fix subnet and default routes on different FIBs on the same subnet.

These two bugs are closely related.  The root cause is that ifa_ifwithnet
does not consider FIBs when searching for an interface address.

sys/net/if_var.h
sys/net/if.c
        Add a fib argument to ifa_ifwithnet and ifa_ifwithdstadddr.  Those
        functions will only return an address whose interface fib equals the
        argument.

sys/net/route.c
        Update calls to ifa_ifwithnet and ifa_ifwithdstaddr with fib
        arguments.

sys/netinet/in.c
        Update in_addprefix to consider the interface fib when adding
        prefixes.  This will prevent it from not adding a subnet route when
        one already exists on a different fib.

sys/net/rtsock.c
sys/netinet/in_pcb.c
sys/netinet/ip_output.c
sys/netinet/ip_options.c
sys/netinet6/nd6.c
        Add RT_DEFAULT_FIB arguments to ifa_ifwithdstaddr and ifa_ifwithnet.
        In some cases it there wasn't a clear specific fib number to use.
        In others, I was unable to test those functions so I chose
        RT_DEFAULT_FIB to minimize divergence from current behavior.  I will
        fix some of the latter changes along with PR kern/187553.

tests/sys/netinet/fibs_test.sh
tests/sys/netinet/udp_dontroute.c
tests/sys/netinet/Makefile
        Revert r263738.  The udp_dontroute test was right all along.
        However, bugs kern/187550 and kern/187553 cancelled each other out
        when it came to this test.  Because of kern/187553, ifa_ifwithnet
        searched the default fib instead of the requested one, but because
        of kern/187550, there was an applicable subnet route on the default
        fib.  The new test added in r263738 doesn't work right, however.  I
        can verify with dtrace that ifa_ifwithnet returned the wrong address
        before I applied this commit, but route(8) miraculously found the
        correct interface to use anyway.  I don't know how.

        Clear expected failure messages for kern/187550 and kern/187552.

MFC r263738

tests/sys/netinet/Makefile
tests/sys/netinet/fibs.sh
        Replace fibs:udp_dontroute with fibs:src_addr_selection_by_subnet.
        The original test was poorly written; it was actually testing
        kern/167947 instead of the desired kern/187553.  The root cause of the
        bug is that ifa_ifwithnet did not have a fib argument.  The new test
        more directly targets that behavior.

tests/sys/netinet/udp_dontroute.c
        Delete the auxilliary binary used by the old test
MFC r264887

Fix host and network routes for new interfaces when net.add_addr_allfibs=0

sys/net/route.c
        In rtinit1, use the interface fib instead of the process fib.  The
        latter wasn't very useful because ifconfig(8) is usually invoked
        with the default process fib.  Changing ifconfig(8) to use setfib(2)
        would be redundant, because it already sets the interface fib.

tests/sys/netinet/fibs_test.sh
        Clear the expected ATF failure

sys/net/if.c
        Pass the interface fib in calls to rtrequest1_fib and rtalloc1_fib

sys/netinet/in.c
sys/net/if_var.h
        Add a fibnum argument to ifa_switch_loopback_route, a subroutine of
        in_scrubprefix.  Pass it the interface fib.
MFC changes related to PR kern/189089.  Unlike CURRENT, stable/10 does not
panic when you attempt to remove the IP address.  But it still fails to
remove the address.

MFC r265094

Add regression test for PR kern/189088.

MFC r265092

Fix a panic when removing an IP address from an interface, if the same
address exists on another interface.  The panic was introduced by change
264887, which changed the fibnum parameter in the call to rtalloc1_fib() in
ifa_switch_loopback_route() from RT_DEFAULT_FIB to RT_ALL_FIBS.  The
solution is to use the interface fib in that call.  For the majority of
users, that will be equivalent to the legacy behavior.
MFC r266609:
Change the _rtld_atfork() to lock the bind lock in write mode.
MFC r267067:
Cross-reference jot(1) and seq(1).

MFC r267098 (by pluknet):
mdoc: drop the trailing dot from the xref list.
MFC: r266931

Grammar cleanup; sort SEE ALSO.
MFC r267078, r267079:

   Update vt(4) console font author's email address
   Remove extra copy of old email address.
MFC r260913,266895:
Add a new flag to /etc/ttys: onifconsole. This is equivalent to "on" if the
device is an active kernel console and "off" otherwise. This is designed to
allow serial-booting x86 systems to provide a login prompt on the serial line
by default without providing one on all systems by default. Set this flag
on x86 systems for ttyu0.

Comments and suggestions by:	grehan, dteske, jilles
MFC r267044, r267120, r267210 and r267211:
Multiple fixes for FULL and LOW speed USB transfers going through
the DWC OTG as split transactions. INTERRUPT transfers should have
a higher chance of success after this series of patches and the
chance of data loss should be reduced.
MFC r267082:
cxgbe(4):  Properly account for the freelist buffers used when returning
early from service_iq due to a budget restriction.  This fixes a potential
rx hang when using INTx.
MFC r267160:
  Dereference portaudit(1), as it is now deprecated and its
  functionality exists in pkg-audit(8).

Sponsored by:	The FreeBSD Foundation
Document r267236, ttys 'onifconsole'

Sponsored by:	The FreeBSD Foundation
MFC: r267184

Add vte(4) to the hardware notes.
MFC:	r267256

Merge OpenSSL 1.0.1h.

Approved by:	so (delphij)
MFC r267089:

Remove D-Link DWA140 rev D1 by accident.
MFC svn 267065 and 267187

make sure ifp->if_transmit returns 0 if a buffer is enqueued.
This should also be merged to stable/9.

After this fix, drivers still known to have this bug are igxbe/ixv
and i40e.

Drivers using if_transmit are correct, and so are most of the
other drivers that reassing if_transmit.

Among other things, this bug causes panics when using netmap emulation
on top of generic drivers.
MFC 267167: whitespace changes (comments)
MFC 267168:
misc bugfixes:
- stdio.h is needed for fprint()
- make memsize uint32_t to avoid errors due to overflow
- honor the *XPOLL flagg in NIOCREGIF requests
- mmap fails wit MAP_FAILED, not NULL.