Bug 19319: Reflected XSS Vulnerability in opac-MARCdetail.pl

Bug 19319: Reflected XSS Vulnerability in opac-MARCdetail.pl

Try going to this URL on your site: /cgi-bin/koha/opac-MARCdetail.pl?biblionumber=2"><TEST>

Test Plan:
1) Go to /cgi-bin/koha/opac-MARCdetail.pl?biblionumber=2"><TEST>
2) Note <TEST> is embedded all over the html
3) Apply this patch
4) Refresh the page, note the injection is gone!
5) run koha qa test tools

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit 617e87c59d0b270d424aa4f1977e3e95c019e0b5)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>