Bug 19108 - Stored XSS in authtypes.pl

Bug 19108 - Stored XSS in authtypes.pl

To Test
1. Hit the page /cgi-bin/koha/admin/authtypes.pl?op=add_form
2. Add a text in the field Description that contains js
3. Save the page.
4. Notice js is execute
5. Apply patch and reload, the js is escaped

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit bc780f588bc908f8b1d0da8987b20914996d942c)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>