MFC r250528:
	Teach wpa_supplicant to properly compute wireless signal strength.

PR:		bin/170631
MFC r250509:
	The M_VESA_MODE_MAX is latest valid mode - not the first invalid.
	Permit its use in vidcontrol -i

PR:		bin/119483
MFC revisions 243049,243129,244134,245871,245912,249698,249924
MFC: r250487

Adding a detach method to p4tcc driver.

PR:		118739
Submitted by:	Dan Lukes <dan@obluda.cz> (earlier version)
Reviewed by:	jhb
Approved by:	sbruno (mentor)