- 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 r273955,274060,274164: Add /etc/rc.d/growfs script.

add an rc.d script to automatically grow the specified FS... It has
been tested on both MBR and GPT... It won't be enabled until you add
growfs_enable="YES" and will only run on first boot..