K 10
svn:author
V 4
avos
K 8
svn:date
V 27
2016-02-29T20:56:02.614460Z
K 7
svn:log
V 397
net80211: wakeup scan_start() task when null data frame was actually
transmitted

- Use M_TXCB mechanism to report about null data frame transmission.
- Increase timeout from 1 to 10 ms (the previous one may be not enough
for non-empty queue).

Tested with:
 * Intel 3945BG, STA mode.
 * RTL8188CUS, STA mode.

Approved by:	adrian (mentor)
Differential Revision:	https://reviews.freebsd.org/D5147

END