Changed distribution method of VIRSCAN.DAT

As of Februari 20, 1992, we are using a new method to distribute the
VIRSCAN.DAT virus signature file.  As of that date, the distribution
archive is named VSIGYY##.ZIP, where YY is the last two digits of the
current year and ## is the sequence number.  The distribution archive
now also includes AVR modules, which are used to detect self encrypting
viruses.

A monthly update of the distribution archive will be released around
the 20th of every month.

Emergency updates are distributed in case a rapidly spreading virus is
discovered. Emergency updates are distributed named ASIGYY##.ZIP (the
"A" means Additional) and contains a file named ADDNSIGS.DAT.
This file will usually have a rather short life, all emergency updates
are moved over to VIRSCAN.DAT in the next monthly release.
TBSCAN v3.30, TBSCANX v3.10 and HTSCAN  v1.17 automatically detect and
use the ADDNSIGS.DAT file. Emergency updates will be released if they
aree needed.


                                   The Dutch Virus Busters:
                            <JT>, [RiZwi], FV, HT, say_bibi(); & Erwin.