HEADSUP: 802.11 vap support merged

[Sam Leffler]

 From UPDATING:

20080420:
        The 802.11 wireless support was redone to enable multi-bss
        operation on devices that are capable.  The underlying device
        is no longer used directly but instead wlanX devices are
        cloned with ifconfig.  This requires changes to rc.conf files.

        As part of the multi-bss changes the wlan_scan_ap and wlan_scan_sta
        modules were merged into the base wlan module.  All references
        to these modules (e.g. in kernel config files) must be removed.

There's a bunch of documentation still to do.  The key things to know are:

1. remove wlan_scan_* references (config files, loader.conf, etc.)
2. update your rc.conf files with something like

vaps_ath0="wlan0"
ifconfig_wlan0="WPA DHCP"

Past that you can look in tools/tools/net80211/scripts for an idea of
how to use some of the new functionality.

No ETA on the new drivers.  Folks that want to accelerate things can
pick up drivers from p4 or the patch I circulated.  iwn is probably the
closest; it has some issues with roaming.  bwi has cross-build issues
and just doesn't work right for devices I have.  I'm working on getting
firmware for mwl; without it I'm not sure it's worth sticking in cvs.
There's also ral 2860 support that does multi-bss; that's waiting on
info from ralink.

    Sam