- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

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

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

Fix resize regressions tests - we need to destroy BSDlabel before we can
create GPT.

MFC after: 3 days

Correct message.

Pointed out by: jhb
MFC after: 2 weeks

Don't hardcode md0 in message, use $md instead.

Reported by: Ronald Klop <ronald-freebsd8@klop.yi.org>

- Use $md instead of md0, which fixes tests when md(4) device is already
present.
- Correct message - we create GPT, not MBR.

MFC after: 2 weeks

Add a geli resize subcommand to resize encrypted filesystems prior
to growing the filesystem.

Refuse to attach providers where the metadata provider size is
wrong. This makes post-boot attaches behave consistently with
pre-boot attaches. Also refuse to restore metadata to a provider
of the wrong size without the new -f switch. The new -f switch
forces the metadata restoration despite the provider size, and
updates the provider size in the restored metadata to the correct
value.

Helped by: pjd
Reviewed by: pjd