Bug 17025: Fix XSS in serials-search.pl

Bug 17025: Fix XSS in serials-search.pl

Test plan:
Hit
  /serials/serials-search.pl?ISSN_filter="%2F><script>alert('XSS')<%2Fscript>&searched=1
  /serials/serials-search.pl?title_filter="%2F><script>alert('XSS')<%2Fscript>&searched=1

=> Without this patch you will see the alert
=> With this patch, no more alert

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit 1ea1504c30c5c34dd763027caee55dcf359e94cf)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
(cherry picked from commit d432c5bba836601b809a9f807af05ef85e952453)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>
(cherry picked from commit 422eeb01fe83e3e9166406cfb244e3053ad72bd6)
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>