- 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

Merge illumos commit 13455:7205f7794835

1458 D compiler fails to generate error on sizeof() an undefined struct

Reference:
https://www.illumos.org/issues/1458

Tested by: Fabian Keil
MFC after: 3 weeks

Update illumos/dist to revision 13742:b6bbdd77139c
ZFS bits will follow in a separate commit