- 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

MFC r269585 - Honour WITH and WITHOUT_INET6_SUPPORT.

Approved by: glebius (mentor - implicit)

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

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

Use both NO_WFORMAT and NO_WARRAY_BOUNDS for sbin/ipf, it would be too
disruptive to actually fix all the warnings, and the code hasn't been
maintained for several years.

MFC after: 1 week

Switch the default WARNS level for sbin/ to 6.

Submitted by: Ulrich Spörlein

Fix the contents of the underneath .depend files and "make checkdpadd".

create a new build heirarchy for ipfilter tools