Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Remove trailing whitespace per mdoc lint warning

Disussed with: gavin
No objection from: doc
Approved by: joel
MFC after: 3 days

Fix date.

Add firmware downloader for Atheros AR3011 based USB Bluetooth devices.

Hardware donated by: Rusty Nejdl rnejdl at ringofsaturn dot com
Tested by: Rusty Nejdl rnejdl at ringofsaturn dot com
Tested by: Andrzej Tobola ato at iem dot pw dot edu dot pl
MFC after: 3 weeks