kernel: Remove unused KTR_POLLING option.

UPDATING: Mention DEVICE_POLLING is replaced by IFPOLL_ENABLE

UPDATING: Mention SMP is a no-op for now.

kernel: Make SMP support default (and non-optional).

The 'SMP' kernel option gets removed with this commit, so it has to
be removed from everybody's configs.

Reviewed-by: sjg
Approved-by: many

UPDATING: Fix a typo and mention that for usb4bsd, w&k need rebuilding.

Sigh, I had written 'loader.conf' instead of 'make.conf'. It will need
a mention on the release page/errata.

UPDATING: Add some words about usb4bsd.

UPDATING: Some words about GCC 4.7.

Remove doscmd(1).

Whatever it is that people take for running MS-DOS stuff nowadays, we do
not need to maintain this in the base.

It was i386 only, too.

kernel: Remove the unused HW_WDOG option.

kernel/wdog: Compile in kern_wdog.c by default.

Actually it was always compiled in by default but the code depended
on the WATCHDOG_ENABLED option which is not in the GENERIC kernels.

Simply remove

kernel/wdog: Compile in kern_wdog.c by default.

Actually it was always compiled in by default but the code depended
on the WATCHDOG_ENABLED option which is not in the GENERIC kernels.

Simply remove the WATCHDOG_ENABLE option. The code is small, it does
nothing by default than initializing a lock, a /dev/wdog and a
callout, and it also makes it easier for people who want to use
ichwd(4) by simply kldloading it.

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kernel: Remove the no longer functional APIC_IO option.

UPDATING: Add some info about the dma(8) upgrade.

UPDATING: Note that mkdir(1) and install(1) need updating before building.

binutils 2.22: Promote to primary binutils

binutils 2.22: Activate building in world

The next commit will change the default to make binutils 2.22 prime
and demote binutils 2.21 to be the backup.

Revert "binutils 2.22: Activate building in world"

This reverts commit e8402471895f5f3b9bc77fde77d732db0feea249.

Revert "binutils 2.22: Promote to primary binutils"

This reverts commit c2e570e14a87f984d27b71ec02365064555dee87.

binutils 2.22: Promote to primary binutils

binutils 2.22: Activate building in world

The next commit will change the default to make binutils 2.22 prime
and demote binutils 2.21 to be the backup.

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.

Binutils 2.20: Effectively remove from world

There is no longer a reason to maintain multiple versions of binutils
in the base system. While contrib/binutils-2.20 directory isn't being
removed quit

Binutils 2.20: Effectively remove from world

There is no longer a reason to maintain multiple versions of binutils
in the base system. While contrib/binutils-2.20 directory isn't being
removed quite yet, this commit effectively removed binutils 2.20 from
DragonFly.

Sometime in the future, binutils may be removed from the objformat
handler. The value of the BINUTILSVERS variable no longer has any
effect, and the only version of binutils on the system is 2.21.

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UPDATING: Add some words about the ISA only drivers I removed recently.

DEVFS - rollup - Userland, nrelease, and installer

* Remove MAKEDEV and MAKEDEV use in the build system.

* Add a new libc function fdevname() taking a file descriptor and
returning the device nam

DEVFS - rollup - Userland, nrelease, and installer

* Remove MAKEDEV and MAKEDEV use in the build system.

* Add a new libc function fdevname() taking a file descriptor and
returning the device name.

* Remove the MFS /dev for the CD and adjust the nrelease build system
to use devfs.

* Installer adjustments: PFI search path, remove device node maker
(it is non-applicable with devfs).

* Add mount_devfs to the build Makefile.

* Change dhclient to use an auto-cloning bpf.

* The VN device now uses labels by default, and no longer supports
non-label configurations (though you can of course ignore the label
area and just r/w the raw device anyway).

Submitted-by: Alex Hornung <ahornung@gmail.com>, and Matthew Dillon

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Update some documents for git usage.

Add note on move of kernel and modules to boot directory.