vsntp change log2004-03-29	version 2.0.0	 1. vsntp.c: The syhchronization scheduler has been rewritten to	    allow alternative schedulers, in order to work with the problem	    reported by Jean-Alain Le Borgne <jalb@pobox.com> 2007-03-26,	    that sleep() may not return after MS Virtual PC 2007 was suspended	    for a while.	 2. vsntp.c: An alternative schedular using alarm() was added in	    addition to sleep(), based on the contribution by Jean-Alain.	 3. vsntp.c: New subroutine setsigalrm() was added to set the SIGALRM	    signal handler.	 4. vsntp.c: New subroutine alarm_wakeup() was added as the alarm()	    schedular.	 5. vsntp.c: Two new constants SCHEDULER_SLEEP and SCHEDULER_ALARM were	    added as the scheduler choices of the user.	 6. vsntp.c: Two new switches -a/--alarm and -s/--sleep were added for	    the user to choose the scheduler.  The default is currently -s.	 7. vsntp.c: New variable "scheduler" added to as the scheduler choice	    of the user.	 8. vsntp.c: Variable "next" was made global so that the alarm()	    scheduler can access it, too.	 9. vsntp.c: Check the return value of synctime() so that skip logging	    when time was not adjusted (time correct or network error).	10. vsntp.c: Logging of time synchronization after the first time	    was added, in log level LOG_DEBUG.	11. vsntp.c: errstart is now calculated and maintained in synctime()	    instead of neterror(), in order to log the time sequence of the	    network errors.	12. vsntp.c: Re-formatting error messages and warnings according to	    the GNU Coding Standards, as:	      source-file-name:lineno: message            Refer to: http://www.gnu.org/prep/standards/html_node/Errors.html	13. vsntp.c: Added logging before connect(), send() and recv() at	    log level LOG_DEBUG in order to know the current progress when	    debugging network problems.	14. vsntp.c: Added logging of value t1, t2, t3, t4 and toff in log	    level LOG_DEBUG in order to debug time calculation problems.	15. vsntp.c: New subroutine xsigemptyset() was added to run	    sigemptyset() and handle its error.  setsigalrm() was updated	    to use xsigemptyset() instead of sigemptyset().	16. vsntp.c: New subroutine xsigaction() was added to run sigaction()	    and handle its error.  setsigalrm() was updated to use xsigaction()	    instead of sigaction().	17. vsntp.c: English comment fix.  "... and handle errors" was updated	    as "... and handle its error."	18. configure.ac: Added AC_TYPE_SSIZE_T, and added "alarm()" in	    AC_CHECK_FUNCS, acccording to the suggestion by automake 1.9.6.	19. configure.in and aclocal.m4: Regenrated using automake 1.9.6.	20. configure: Regenrated using autoconf 2.61.	21. vsntp.c: Added conditional #ifdef, so that if alarm() is not	    supported on the target platform the alarm() scheduler will not	    be compiled.	22. vsntp.c: A new constant DEFAULT_SCHEDULER was added as the	    default scheduler.	23. Added init.d directory, with a Debian SysV init script, a Red Hat	    SysV init script, a configuration file used by the init scripts,	    and README in 3 languages.	24. Added doc directory, and moved vsntp.texi, vsntp.8 and rfc1769.txt	    inside.	25. vsntp.c: Fixed the basic profile in the beginning comment, from	    synctime.c to vsntp.c.  That was the first name of vsntp.  It was	    renamed for years.	26. vsntp.8: Fixed the BUGS chapter, replacing the originall text with	    the SourceForge users' mailing list information.	27. README, vsntp.8 and vsntp.texi: Added notes about the scheduler	    issue.	28. README, vsntp.8 and vsntp.texi: Added notes about how to debug.	29. README, vsntp.8 and vsntp.texi: Added notes about portability.	30. README, vsntp.8 and vsntp.texi: Added requests to users to let me	    know that someone is using vsntp. :p2004-01-14	version 1.1.1	Documentation fix.	 1. ChangeLog and NEWS year typo fixed. (2003 -> 2004)	 2. Home site at SourceForge done.	 3. Documentation revised on official website, other reference	    information.	 4. Documentation revised on wordings and typos.2004-01-13	 1. HTML page at Tavern IMACAT's done.	 2. texinfo document revised.2004-01-12	version 1.1.0	First public release.	 1. Added texinfo documentation.	 2. Added -i and -p switch.	 3. Default synchronization interval changed to 900 seconds, do avoid	    making troubles with foreign NTP servers.2004-01-11	 1. Added automake and autoconf.	 2. Added documentation: README, INSTALL, COPYING, ChangeLog, NEWS,	    AUTHORS, THANKS, and manpage.2004-01-10	 1. The SourceForge project space approved.2004-01-09	 1. Applying a SourceForge project space.2003-12-24	version 1.0.0	Finalized.	 1. Program name changed from "synctime" to "vsntp".	 2. Protocol changed from RFC 868 Time to RFC 1769 SNTP.	 3. Synchronization interval shortened to 5 seconds.2003-12-23	Start writing, with a name as "synctime".