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)

Adapt for wpa_supplicant / hostapd 0.7.3.

uupdate for 0.6.8

update for wpa_supplicant 0.5.8 import:
o unix domain socket to wpa_cli is configured w/ CONFIG_CTRL_IFACE_UNIX
o terminate on last interface option is configured w/ CONFIG_TERMINATE_ONLASTIF
o ndis/Packet32.c fixups to force roaming mode to manual
o document new mixed_cell config knob

Submitted by: thompsa (Packet32.c)
Reviewed by: thompsa, sephe
Approved by: re (hrs)

add wpa_passphrase utility to the build

PR: bin/104457
Submitted by: Henrik Brix Andersen
MFC after: 1 week