wpa: Import wpa_supplicant/hostapd commits up to b4f7506ff

Merge vendor commits 40c7ff83e74eabba5a7e2caefeea12372b2d3f9a,
efec8223892b3e677acb46eae84ec3534989971f, and
2f6c3ea9600b494d24cac5a38c1cea0ac192245e.

Tested by: philip
MFC after: 2 months

Merge wpa_supplicant and hostapd 0.7.3.

MFV hostapd & wpa_supplicant 0.6.10.

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.