- 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

Use the correct systime.c file instead of the "simulation mode" one.
Should fix the current weirdness in ntpd/ntpdate where the current system
time is not read/updated.

Submitted by: naddy
MFC after: 2 weeks
Pointy hat to: me

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

For variables that are only checked with defined(), don't provide
any fake value.

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/)

style.Makefile(5)

Removed now unused INTERNALSTATICLIB.
INTERNALLIB now implies NOPIC and NOPROFILE.
Removed gratuitous NOMAN.

Update for the import of 4.1.0.

Perform a major cleanup of the usr.sbin Makefiles.
These are not perfectly in agreement with each other style-wise, but they
are orders of orders of magnitude more consistent style-wise than before.

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.

- remove trace of libkvm. It is not used at all.
- reorganise the Makefiles: the order of variables was not the usual one.

Explained gently by: bde

Don't compile mktime, it is already present elsewhere.

Submitted by: bde

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)