- 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

Merge r270677 from head:

Fix xref, pam(8) -> pam(3)

PR: 193045
Submitted by: rsimmons0 gmail com

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

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

Removed whitespace at BOF, EOL & EOF.

Try to describe the control flags a little better.

Awright, egg on my face. I should have taken more time with this. The
conversion script generated the wrong format, so the configuration files
didn't actually work. Good thing I hadn't thrown the switch yet...

Sponsored by: DARPA, NAI Labs (but the f***ups are all mine)

Short README for /etc/pam.d, mostly extracted from the comments in pam.conf.