- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

Apply the ntp-related part of r195626 to the correct part of the tree --
the mkver which is used in builds is the one in usr.sbin/ntp/scripts,
not the one in contrib/ntp/scripts.

Pointy hat to: cperciva
Approved by: re (rwatson)

Update the various files to sync with vendor import of 4.2.4p5.
sntp includes a copy of libopts in itself in vendor code, rewrite the
Makefile to compile and use only one copy. It is an internal library, not
installed.

MFC after: 2 weeks

Update our ntpd to the long awaited 4.2.0 version.

This bring us several things:
- updated drivers
- IPv6 support at last
- ntp-genkeys is replaced by ntp-keygen
- ntptrace is now a script (courtesy of John Hay)
- lots of renamed files from .htm to .html (while I prefer .html, I
find the change a bit gratuitous)
- still no manpages :(

Please test and report.

Commit very much helped by: GNU arch (http://gnuarch.org/)

Update ntpd to 4.1.1b. There are two new drivers and the usual bunch of
fixes. See contrib/ntp/ChangeLog for details.

MFC after: 1 month
Prodded by: jhay
Tested on: sparc64 (panther), alpha (beast) and i386.

Update ntpd to 4.1.1a. This contains many bug fixes made on the STABLE
branch and a few new drivers. See contrib/ntp/ChangeLog for details.

Hide kernel header sys/lock.h from ntp [1]

PR: bin/33914
Submitted by: thomas, bde[1]
MFC after: 1 month

Update for the import of 4.1.0.

setlocale(3) has been fixed to match POSIX standard:
LC_ALL takes precedence over other LC_* envariables.

Fix date again.
Previous fix was overwritten by new commits.

Update to 4.0.99b. According to Harlan Stenn, the things holding the
release of 4.1.0 are not FreeBSD-related so importing this one is
not a problem.

Use LC_TIME=C for date

Please welcome the brand new ntp4 daemon & utilities in the FreeBSD tree.
This is the second part of the commit (the third -- link in usr.sbin/Makefile)
will be done after a more complete review by phk & obrien.

NOTE: the number of drivers included in the default configuration is very
minimal, mainly local clocks and the one I use RAWDCF. Anyone wanting to
have a more complete version will find recompilation very easy.

It builds and runs on both alpha & i386. It also does survive "make world".

Reviewed by: phk, obrien (partly)