Use IWN_NBANDS rather than a hard-coded limit.

Tested:

* Intel 5100, STA
Fix off-by-one. Sorry!
Replace the hard-coded RX queue value check with IWN_UNSOLICITED_RX_NOTIF.
If A-MPDU transmission fails entirely, then no BA is received from the
NIC and pushed up to the driver.  Unfortunately this means there's
no rate control notification done.  Thus, if the rate control code
makes a decision that hits a crappy rate that can't succeed, the
rate code would never lower the rate and packet loss would continue.

So, fake some rate control notification in this case.
MFV r257952:

Upgrade to OpenSSH 6.4p1.

Bump VersionAddendum.

Approved by:	des
Add support for the MediaTek/Ralink RT5370/RT5372 chipset.

Tested with the TP-Link TL-WN727N (RT5370) and the D-Link DWA-140 (RT5372)
on i386/amd64/arm with WPA.
Mention the RT5370/RT5372 chipset.
Remove r257748 by accident.
Update log message.  Picobsd stopped using kgzip a while ago.
Add missing line breaks.

PR:		181900
MFC after:	1 week
Use opt_syscons.h to get defines.
Define max number of windows as VT_MAXWINDOWS if defined, or as MAXCONS, or 12.
Define VT_MOUSE_PASTEBUTTON and VT_MOUSE_EXTENDBUTTON if defined
SC_TWOBUTTON_MOUSE or VT_TWOBUTTON_MOUSE.

Sponsored by:	The FreeBSD Foundation
Add mouse cursor format structure.

Sponsored by:	The FreeBSD Foundation
Rename font_default.c to vt_font_default.c. Prefix will make less possibility
for object file names collision.

Sponsored by:	The FreeBSD Foundation
Add default cursor pixmap.

Sponsored by:	The FreeBSD Foundation
o Add link to vt_mouse_cursor.c.
o Update link to vt_font_default.c.
o Remove link to deleted driver vt_intel.

Sponsored by:	The FreeBSD Foundation
Add mouse related vtbuf operations.

Sponsored by:	The FreeBSD Foundation
Add cut/paste region markers.

Sponsored by:	The FreeBSD Foundation
Define marker support functions and type of markers.

Sponsored by:	The FreeBSD Foundation
Add mouse related bits.

Sponsored by:	The FreeBSD Foundation
Use vtbuf_iscursor method instead of macro to get chars to display inverted.

Sponsored by:	The FreeBSD Foundation