Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

Remove #define _KERNEL hacks from libprocstat

Make sys/buf.h, sys/pipe.h, sys/fs/devfs/devfs*.h headers usable in
userspace, assuming that the consumer has an idea what it is for.
Unhide more material from sys/mount.h and sys/ufs/ufs/inode.h,
sys/ufs/ufs/ufsmount.h for consumption of userspace tools, with the
same caveat.

Remove unacceptable hack from usr.sbin/makefs which relied on sys/buf.h
being unusable in userspace, where it override struct buf with its own
definition. Instead, provide struct m_buf and struct m_vnode and adapt
code to use local variants.

Reviewed by: mckusick
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D28679

makefs: share denode.h between kernel msdosfs and makefs

There is no need to duplicate this file when it can be trivially
shared (just exposing sections previously under #ifdef _KERNEL).

MFC with: r351273
Differential Revision: The FreeBSD Foundation

makefs: use `char *` not `void *` for buf b_data, drop casts in msdos

(The kernel uses caddr_t.)

Suggested by: cem
Reviewed by: cem
MFC with: r351273
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D21348

makefs: use FreeBSD brelse function signature

Although the ffs (and later msdosfs) implementation in makefs is
independent of the one in kernel, it makes sense to keep differences to
a minimum in order to ease comparison and porting changes across.

Submitted by: Siva Mahadevan
Sponsored by: The FreeBSD Foundation

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.

makefs: make buf generic

it has nothing to do with ffs and will eventually be moved.
gc sectorsize.

This is a corrected version of r317744.

NetBSD versions:
ffs.c 1.58
ffs/buf.c 1.14 1.18
ffs/buf.h 1.8

Submitted by: Siva Mahadevan <smahadevan@freebsdfoundation.org>
Obtained from: NetBSD
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D10803

makefs: make buf generic

it has nothing to do with ffs and will eventually be moved.
gc sectorsize.

NetBSD versions:
ffs.c 1.58
ffs/buf.c 1.14 1.18
ffs/buf.h 1.8

Obtained from: NetBSD
Sponsored by: The FreeBSD Foundation

makefs: make the buffer functions look exactly like the kernel ones

From NetBSD christos Sat Jan 26 00:19:39 2013 +0000

make the buffer functions look exactly like the kernel ones and add other
cruft to make the kernel files compile.

ffs.c 1.54
ffs/buf.c 1.13
ffs/buf.h 1.3
ffs/ffs_alloc.c 1.21
ffs/ffs_balloc.c 1.15

Reviewed by: marcel, ngie
Obtained from: NetBSD
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D8404

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.