Initial import of binutils 2.22 on the new vendor branch

Future versions of binutils will also reside on this branch rather
than continuing to create new binutils branches for each new version.

- Add missing header protector
- Strip blank line at the end of file

* Greatly reduce the complexity of the LWKT messaging and port abstraction.
Significantly reduce the overhead of the subsystem.

* The message abort algorithm has been rewritten. It now sends a

* Greatly reduce the complexity of the LWKT messaging and port abstraction.
Significantly reduce the overhead of the subsystem.

* The message abort algorithm has been rewritten. It now sends a
separate message to issue the abort instead of trying to requeue
the original message. This also means the TAILQ embedded in the
lwkt_msg structure can be used by unrelated code during processing
of the message.

* Numerous MSGF_ flags have been removed, and all the LWKT msg/port
algorithms have been rewritten and simplified. The message structure
is now only touched by the current owner in all situations.

* Numerous structural fields have been removed. In particular, the
fields used for message abort sequencing have been simplified and
we do not try to embed a 'command' field in the base LWKT message
any more.

* Clean up the netmsg abstraction, which is used all over the network stack.
Instead of trying to overload fields in lwkt_msg we now simply extend
the base lwkt_msg into struct netmsg. The function dispatch now takes
a netmsg and returns void (before we had to return EASYNC), and we no
longer need weird casts.

Accept/connect message aborts are now greatly simplified.

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network - Major netmsg retooling, part 1

* Remove all the netmsg shims and make all pr_usrreqs and some proto->pr_*
requests directly netmsg'd.

* Fix issues with tcp implied connects and tcp6->tc

network - Major netmsg retooling, part 1

* Remove all the netmsg shims and make all pr_usrreqs and some proto->pr_*
requests directly netmsg'd.

* Fix issues with tcp implied connects and tcp6->tcp4 fallbacks with
implied connects.

* Fix an issue with a stack-based udp netmsg (allocate it)

* Consolidate struct ip6protosw and struct protosw into a single
structure and normalize the API functions which differed between
the two (primarily proto->pr_input()).

* Remove protosw->pr_soport()

* Replace varargs protocol *_input() functions (ongoing) with fixed
arguments.

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network - Completely revamp the netisr / dispatch code

* All netisrs are dispatched MPSAFE (followup in later commits)

* Centralize the protocol threads. There is now just one thread
per cpu man

network - Completely revamp the netisr / dispatch code

* All netisrs are dispatched MPSAFE (followup in later commits)

* Centralize the protocol threads. There is now just one thread
per cpu managed by the netisr code. No more separate tcp/udp threads
on each cpu.

* Make the mbuf M_HASH/m_pkthdr.hash mechanic the central routing
mechanic for netmsgs.

* Remove the netisr ip_mport and pktinfo_portfn stuff and replace with a
cpufn function which handles M_HASH/m_pkthdr.hash when M_HASH is not
already set.

* Seriously clean up the packet input paths. Adjust ether_input_chain() and
friends to not have to adjust the mbuf forwards and backwards, instead
pass a header offset to the ni_cpufn function. The ip pullup and other
related code will use the offset to determine where the ip header is
within the packet.

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network - Move socket from netmsg ext to netmsg header, add port to socket

These changes should make it easier to debug mbufs routed to the wrong
protocol threads. Note that IPV6 is routed to netis

network - Move socket from netmsg ext to netmsg header, add port to socket

These changes should make it easier to debug mbufs routed to the wrong
protocol threads. Note that IPV6 is routed to netisr0, even for tcp and udp
packets, so for now we do not KKASSERT that the port matches directly.

The TCP code still KKASSERTs that the timers are running on the correct cpu,
since the cpu is still correct for IPV6 TCP/UDP packets even when the
protocol thread is wrong (netisr_cpu 0 instead of tcp_thread 0 or
udp_thread 0).

* Instead of recalculating the port based on the inp or mbuf all the time,
add a so_port field to the socket structure directly.

* The socket pointer is now part of the netmsg header, even though some
subsystems do not need it. This allows us to validate the message port
more easily.

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