Bug 19105 - XSS Stored in holidays.pl

Bug 19105 - XSS Stored in holidays.pl

To Test
1. Hit the page /cgi-bin/koha/tools/holidays.pl
2. Select the date
3. Add a text in the field Title and Description that contains js
4. Save the page.
5. Notice js is execute
6. Apply patch and reload, the js is escaped

Fixed for all holidays

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>