Log Message:
Update to ntp 4.2.0.
All platforms:

	Autokey, using OpenSSL.
	IPv6 support.
	Bugfixes in loopfilter and refclocks.

NetBSD:

	Support for editline command line editing
	    in "ntpq" and "ntpdc".

NetBSD-current:

	Use nanosecond resolution POSIX timers.