wpa: Import wpa_supplicant/hostapd commits up to b4f7506ff

Merge vendor commits 40c7ff83e74eabba5a7e2caefeea12372b2d3f9a,
efec8223892b3e677acb46eae84ec3534989971f, and
2f6c3ea9600b494d24cac5a38c1cea

wpa: Import wpa_supplicant/hostapd commits up to b4f7506ff

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

Tested by: philip
MFC after: 2 months

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MFV r341618:

Update wpa 2.6 --> 2.7.

MFV r324714:

Update wpa 2.5 --> 2.6.

MFC after: 1 month

Update hostapd/wpa_supplicant to version 2.5.

Tested by several people on current@/wireless@.

Relnotes: yes