- 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

doc fix: option MFS is obsolete. use MD_ROOT instead.

PR: conf/93878

Backout the hack to install mtree, newsyslog, and touch in the cloned
root in the previous commit. We'll fix /etc/rc.d/var directly (someday).

Hack around the fact that the current diskless scripts require some
binaries in /usr before /usr is mounted by copying those files to the
root.

Stop making devices. devfs is manditory.

New script to help creation of shared readonly diskless partition.
It also has some instructions on how to setup the client and
the server. I have been using this code for over 2 years
on RELENG_3 and later RELENG_4. Have not tried on CURRENT, but
in case there are any issues these are in /etc/rc and
/etc/rc.diskless{12}