Code from FreeBSD to give mtree the ability to exclude items from its traversal
now that this is in freebsd, import vendor copy as base.
import freebsd smbfs code
Pull in net80211/ from FreeBSD. This contains Sam Leffler's
enhancements to the 802.11 layer, which are necessary for ath(4),
the Atheros-chipset driver.
Bring net80211/ sources up-to-date with FreeBSD.

PR:
Submitted by:
Reviewed by:
Approved by:
Obtained from:
MFC after:
Bring net80211/ sources up-to-date with FreeBSD.

PR:		
Submitted by:	
Reviewed by:	
Approved by:	
Obtained from:	
MFC after:
Initial import of ath(4) from FreeBSD.
Initial import of ath(4) from FreeBSD.
Initial import of ath(4) from FreeBSD, try #2. (Thanks,
Thomas Klausner.)
Initial import of ath(4) from FreeBSD.
Import FreeBSD's net80211 of 12 Dec 2003
Import FreeBSD's ath of 12-dec-2003
Import FreeBSD's net80211 of 28-apr-2004
Import FreeBSD's ath of 28-apr-2004
Import madwifi's HAL of 19-jul-2004
ipw(4) - Intel PRO/Wireless 2100 driver.
Written by Damien Bergamini, from http://damien.bergamini.free.fr/ipw/
iwi(4) - Intel PRO/Wireless 2200AG/2915ABG driver.
Written by Damien Bergamini, from http://damien.bergamini.free.fr/ipw/

Ad-hoc mode and roaming are not fully implemented yet.
Import FreeBSD's net80211(9) of 2005-05-18
Import FreeBSD's ath(4) of 2005-05-18
Import FreeBSD's net80211(9) of 2005-07-11