- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

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

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

Refactor out the software LED config code into a common function, called
ath_led_config().

The eventual aim is to have both software and hardware based LED
configuration done here.

First pass of LED related code changes.

Migrate the LED code out of if_ath.c and into if_ath_led.c.
These routines are _all_ software based LED blinking.