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)

Add new device ids.
Buffalo (Melco Inc.) WLI-UC-G

PR: 141777

mdoc: drop redundant .Pp and .LP calls

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

mdoc: order prologue macros consistently by Dd/Dt/Os

Although groff_mdoc(7) gives another impression, this is the ordering
most widely used and also required by mdocml/mandoc.

Reviewed by: ru
Approved by: philip, ed (mentors)

Use the newly brought %U macro.

lack of power save violates 802.11 and is a bug, not a "caveat"

note lack of power save support in ap mode

Submitted by: "Paul B. Mahol" <onemda@gmail.com>

Add the Buffalo WLI-U2-SG54HG

Add DWA-110 and DWA-111 to the list of devices supported by rum(4)

Multi-bss (aka vap) support for 802.11 devices.

Note this includes changes to all drivers and moves some device firmware
loading to use firmware(9) and a separate module (e.g. ral). Also there
no longer are separate wlan_scan* modules; this functionality is now
bundled into the wlan module.

Supported by: Hobnob and Marvell
Reviewed by: many
Obtained from: Atheros (some bits)

Prepare for automatic hardware notes generation:

- mention the driver name and supported chipsets in the HARDWARE section
- remove unnecessary Li arguments

Approved by: re (blanket)

Add a man page for wlan_amrr

Reviewed by: sam, sephe

Add support for Ralink Technology RT2501USB/RT2601USB devices.

Reviewed by: sam, sephe
Obtained from: OpenBSD