Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare
to this event, adding if_var.h to files that do need it. Also, include
all includes that now are included due to implicit pollution via if_var.h

Sponsored by: Netflix
Sponsored by: Nginx, Inc.

Retire the MALLOC and FREE macros. They are an abomination unto style(9).

MFC after: 3 months

Factor out my copyrights + licenses from Charles D. Cranor and
University of Washington copyrights, which include the
advertising clause. Move $NetBSD$ into standard location for
FreeBSD source files, and normalize formatting.

MFC after: 3 days

Update natm PCB debugging code:

- Depend on opt_ddb.h, since npcb_dump() is ifdef'd DDB.
- Include ddb/ddb.h so we can call db_printf() and use DB_SHOW_COMMAND().
- Don't test results of malloc() under DIAGNOSTIC, let the memory allocator
take care of its own invariants.

MFC after: 1 month

Lock down netnatm and mark as MPSAFE:

- Introduce a subsystem mutex, natm_mtx, manipulated with accessor macros
NATM_LOCK_INIT(), NATM_LOCK(), NATM_UNLOCK(), NATM_LOCK_ASSERT(). It
protects the consistency of pcb-related data structures. Finer grained
locking is possible, but should be done in the context of specific
measurements (as very little work is done in netnatm -- most is in the
ATM device driver or socket layer, so there's probably not much
contention).

- Remove GIANT_REQUIRED, mark as NETISR_MPSAFE, remove
NET_NEEDS_GIANT("netnatm").

- Conditionally acquire Giant when entering network interfaces for
ifp->if_ioctl() using IFF_LOCKGIANT(ifp)/IFF_UNLOCKGIANT(ifp) in order
to coexist with non-MPSAFE atm ifnet drivers..

- De-spl.

MFC after: 2 weeks
Reviewed by: harti, bms (various versions)

/* -> /*- for license, minor formatting changes

Style(9): remove unneccesary space and blank lines, indentation,
function prototypes. Use LIST_FOREACH instead of explicit loops.

The indentation of functions indendet by 4 space have been left alone.
2-space indented functions have been re-indented.

Use __FBSDID().

Back out M_* changes, per decision of the TRB.

Approved by: trb

Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.

Remove __P.

Mechanical change to use <sys/queue.h> macro API instead of
fondling implementation details.

Created with: sed(1)
Reviewed by: md5(1)

Convert more malloc+bzero to malloc+M_ZERO.

Submitted by: josh@zipperup.org
Submitted by: Robert Drehmel <robd@gmx.net>

Add $FreeBSD$

Back out DIAGNOSTIC changes.

Turn DIAGNOSTIC into a new-style option.

Fixed a sloppy common-style declaration.

natm_pcb.c:
Include <sys/socketvar.h> which will be used when M_PCB is declared
in the right place.

Last major round (Unless Bruce thinks of somthing :-) of malloc changes.

Distribute all but the most fundamental malloc types. This time I also
remembered the trick to making things static: Put "static" in front of
them.

A couple of finer points by: bde

Removed unused #includes.

This commit was generated by cvs2svn to compensate for changes in r25603,
which included commits to RCS files with non-trunk default branches.

import Chuck Cranor's ATM driver