May-31-2001
	1.0 initial release, works with sFlow version 2
Jan-15-2002
	1.2 changes to allow compilation on Solaris - thanks to Bogdan Ionescu from University of Ottowa
Fed-7-2002
	1.3 bugfixes to timestamps in NetFlow v5 export - thanks to Chris Cook of Asta Networks
	    + changes to configure.in and sflowtool.h to try and improve portability across unix platforms