- 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)

MFC r280849,280915-280916,281015-281016,282097,282408,282415,283542,
284864,285169-285170,285435:

ntp 4.2.8p3.

Relnotes: yes
Approved by: re (?)

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

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

Merge ntpd & friends 4.2.4p5 from vendor/ntp/dist into head. Next commit
will update usr.sbin/ntp to match this.

MFC after: 2 weeks

Import ntp 4.2.4p5 in the vendor code area. Far too many changes to list here,
please see CommitLog for detailed changes.

XXX html/build/hints/solaris.xtra.4095849 is not being imported as it conflicts
with the detect-merge-conflict.sh script in our repo.