When marcxml cannot be parsed into a MARC::Record object, the biblio is
undisplayable and it obviously breaks many features in Koha. This script
can test to parse every marcxml, and alert on failures. Optionally, the
marcxml can be replaced from the marc field.
See extensive perldoc for details.
Signed-off-by: Galen Charlton <galen.charlton@liblime.com>