- Copy stable/10@285827 to releng/10.2 in preparation for 10.2-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.2.
- Update default pkg(8) configuration to use the quarterly branch.[1]

Discussed with: re, portmgr [1]
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

Fix panic on attaching to non-existent interface (introduced by r233937, pointed by hrs@)
Fix panic on tcpdump being attached to interface being removed (introduced by r233937, pointed by hrs@ and adrian@)
Protect most of bpf_setf() by BPF global lock

Add several forgotten assertions (thanks to adrian@)

Document current locking model inside bpf.c
Document EVENTHANDLER(9) usage inside BPF.

Approved by: kib(mentor)
Tested by: gnn
MFC in: 4 weeks

- Fix prototype of bpf_filter().
- Document what passing it a zero buflen argument means.

Use 'manual page' instead of 'man page' for consistency.

Approved by: re (hrs)

Fix prototype for bpf_mtap2().

MFC after: 3 days

Markup fixes.

Scheduled mdoc(7) sweep.

Remove trailing spaces.

Reviewed by: brueffer
MFC after: 3 days

Add a man page for the kernel part of bpf. I made some edits to the
man page after Orla, so the mistakes are probably mine. Leave a
note on the door welcoming the mdoc police.

Submitted by: Orla McGann <orly@cnri.dit.ie>