Update xboxfb driver to actual state.
NOTE: Not tested.

Sponsored by:	The FreeBSD Foundation
Remove reference to FreeBSD 6.2-RELEASE from 'Upgrading from
previous releases' paragraph since all supported version of FreeBSD
now support binary upgrades

Remove 'of course,' from foot note reminding to create a backup
before attempting a binary update

Approved by:    hrs (mentor)
- Fix indent.
- Minor clean up after DB5 migration.
Provide a simplified way to specify GPIO pins for the Atmel port.
Add data so we can convert a PIO unit number into a base address.
netmap_user.h:
   add separate rx/tx ring indexes
   add ring specifier in nm_open device name

netmap.c, netmap_vale.c
   more consistent errno numbers

netmap_generic.c
   correctly handle failure in registering interfaces.

tools/tools/netmap/
   massive cleanup of the example programs
   (a lot of common code is now in netmap_user.h.)

nm_util.[ch] are going away soon.
pcap.c will also go when i commit the native netmap support for libpcap.
[automated] Merge in upstream-github/master