To update to 2.1 from version 1.98 or below:
-do a full db dump with manoc_dump.pl script running
 perl script/manoc_dump.pl --save fulldump.tar.gz
-load the dump with the same script to make it do the conversions needed by version 2.1 
 perl script/manoc_dump.pl --load fulldump.tar.gz --disable-fk --overwrite --force