ntpd incompatibilites

1. The Sun added slewalways option is not present. The startup method
	detects the presence of this option and will automatically 
	set the command line option "--slew" with is the closest 
	approximation. This option does not provide a true "slewalways"
	feature. Instead it increases the threshold at which a step is
	done. It also automatically disables the kernel PLL, which 
	we always required when slewalways was used, but since it 
	was a separate step, it was prone to operator error.

	The default threshold with this option is 600 seconds, and is
	tunable in the configuration file. Since 600 seconds would take
	14 days to slew, this is already a very high upper bound.

2. The default is to require authentication (keys) of broadcast, multicast
	and active peer servers. This makes using these modes more 
	difficult since the keys must be set up, but allowing unsolicited
	anonymous servers to influence your clock is highly dangerous.

	Because of the danger, the default was changed in Solaris 10, so
	this is not really incompatible with the current version. We
	mitigate this by providing a settable SMF property to turn this
	requirement off. It can also be changed by placing "disable auth"
	in the configuration file.

2. The method to disable the kernel phase-locked-loop has been changed
	from "disable pll" to "disable kernel".

3. The keyword "pps" to disable/enable was removed. This is now controled
	at the "server" keyword lines.

4. The "noserve" restriction was made more strict. Previously, a noserve
	client could be used as a peer and time served to us, even though
	we would not serve time to him. In the new version, time is
	prevented from flowing either way.

5. The "donttrust" restriction was loosened. In the previous version, we
	woiuld never trust the host. In the new version, the host is
	trusted if there are valid authentication keys with the request.
	In other words, it amounts to a "check id" option.

6. Clock types 2(TRAK), 15(TRUE), 23(PTB), 24(USNO) and 25(TRUE) are no
	longer available. However, all of these clock types were retired
	because support for their corresponding hardware was folded into
	other clock types.	

7. The "authentication (yes|no)" keyword line was dropped in favor of the
	already present "enable/disable auth" form. 

8. The "precision" keyword line was dropped because ntpd now detects the 
	precision automatically.

9. The clientlimit and clientperiod keyword lines were dropped because the
	system that rate limits clients was changed to work without these
	settings.

10. The tickadj keywork line was dropped. The value is now read directly from
	the kernel.


ntpdate incompatibilities.

1. The Sun added "-m" option to use mutlicast servers in the ntpdate call
	is not present. 


Also the names xntpdc and xntpd were replaced with ntpdc and ntpd.