Fix in the C++ DateTime class. The affected server files are included.

The following is taken from patch #537: After installation, if not
done before, the old flab files in the archive must be removed (as
openit user):

cd $ARCHIVE_DIR/license
find flexpoller -name "*FLAB*" | xargs rm

$ARCHIVE_DIR can be found in /etc/opt/openit/openit.cfg

The flab must be run for the affected period. Please proceed as
follows (as openit user):

/opt/openit/bin/flab -c /var/opt/openit/etc/daft.conf <start> <end>

<start> and <end> has format YYYY-MM-DD

Some bogus lines in the FLEXlm debug log combined with the 
wrong timestamps could cause errors in the output from 
flab, and thus the report data for the FLEXlm debug log
based data types.