Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE
cycle.

Prune svn:mergeinfo from the new branch, and rename it to RC1.

Update __FreeBSD_version.

Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and
the dvd1.iso packages population.

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

MFC r303160.

Update leap-seconds to leap-seconds.3676752000.

As per https://datacenter.iers.org/web/guest/eop/-/somos/5Rgv/latest/16:

UTC TIME STEP
on the 1st of January 2017

A positive leap second will be introduced at the end of December 2016.
The sequence of dates of the UTC second markers will be:

2016 December 31, 23h 59m 59s
2016 December 31, 23h 59m 60s
2017 January 1, 0h 0m 0s

The difference between UTC and the International Atomic Time TAI is:

from 2015 July 1, 0h UTC, to 2017 January 1 0h UTC : UTC-TAI = - 36s
from 2017 January 1, 0h UTC, until further notice : UTC-TAI = - 37s

Obtained from: ftp://tycho.usno.navy.mil/pub/ntp/leap-seconds.3676752000
See also: https://www.iers.org/SharedDocs/News/EN/BulletinC.html
https://datacenter.iers.org/web/guest/eop/-/somos/5Rgv/latest/16

Relnotes: yes

Approved by: re@ (delphij@)

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

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

Update leap-seconds to leap-seconds.3661459200.
NO leap second will be introduced at the end of June 2016.

This commit reapplies the r298887 minor spelling fix.

Obtained from: ftp://tycho.usno.navy.mil/pub/ntp/.
See also: http://www.iers.org/SharedDocs/News/EN/BulletinC.html
MFC after: 2 weeks

etc: minor spelling fixes.

Mostly comments but these tend to be user-visible.

MFC after: 2 weeks

Update leap-seconds to latest. This will satisfy the ntpd leap-second
version check.

Obtained from: ftp://tycho.usno.navy.mil/pub/ntp/.
See also: http://www.iers.org/SharedDocs/News/EN/BulletinC.html

Add default leap-seconds file. This should help ntp networks get the
leap second date correct

Updates to the file can be obtained from ftp://time.nist.gov/pub/ or
ftp://tycho.usno.navy.mil/pub/ntp/.

Suggested by: dwmalone
Reviewed by: roberto, dwmalone, delphij
Approved by: roberto
MFC after: 1 week