Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

mdoc: reorder sections consistently

- Add Dell Wireless 1390 BCM4311 Mini PCI to supported list.

PR: 154500
Submitted by: Ruslan Mahmatkhanov <cvs-src at yandex.ru>
Approved by: rwatson

Document the fact that bwn works really well on the laptop I'm using
right now (HP 6715b).

mdoc: drop redundant .Pp and .LP calls

They have no effect when coming in pairs, or before .Bl/.Bd

Don't suggest using bwn for the bcm4306 cards in the list. The
bcm4306 cards are ambiguous. BCM4306 rev 2 requires bwi. BCM4306 rev
3 will work with either. Since we can't easily determine which is
which, just remove them.

Fixes spellings and uses the better sentence. While I'm here bumps
date.

Pointed by: imp, Ruslan Mahmatkhanov <cvs-src at yandex dot ru>

Mentions cases when bwi(4) driver should be used that it only wrote
about chipset type instead of card names because it's not easy to sort
names what cards use these chipsets.

Pointed by: imp

Adds LOADER TUNABLES section to mention knobs which could be controlled
by loader(8) interface.

Adds a CAVEATS section to mention DMA issues that currently only
a solution is using PIO mode. As fas as I know all open source based
broadcom drivers for specially LP PHY has this issue because it's
a reverse engineered driver from wl(4).

Pointed by: Warren Block <wblock at wonkity.com>

Adds bwi(4) at SEE ALSO section because some old devices aren't
supported by the bwn(4) firmware that as fas as I know the vendor
dropped its support. Bumps date also.

bwn(4) will first appear in FreeBSD 8.1-RELEASE.

MFC after: 1 week

Updates what firmware module should be used for LP (low power) PHY
users and bumps date.

adds bwn(4) driver for supporting Broadcom BCM43xx chipsets.

o uses v4 firmware instead of v3. A port will be committed to create
the bwn firmware module.
o supports B/G and LP(low power) PHYs.
o supports 32 / 64 bits DMA operations.
o tested on big / little endian machines so should work on all
architectures.

It'd not connected to the build until the firmware port is committed.