March 1, 1999
	Added first code for display filters.

February 20, 1999
	Guy added the netxray file format.

January 27, 1999
	Added token-ring support in netmon.c

January 19, 1999
	Changed number of arguments of wtap_open_offline().

January 14, 1999
	Guy added support for reading Microsoft Network Monitor files.

January 7, 1999
	Made all filetypes provide a per-packet encapsulation type, and
	removed wtap_encapsulation(), effectively getting rid of a per-file
	encapsulation type.

January 1, 1999
	Added iptrace file format.

December 10, 1998
	Proper timestamp calculations added to ngsniffer.c and lanalyzer.c