Bug 19086 XSS in members/member.pl

Bug 19086 XSS in members/member.pl

To test
1/ hit /cgi-bin/koha/members/member.pl?&searchmember=<script>alert('XSS Payload')</script>
2/ Notice js is executed
3/ Apply patch, reload
4/ js is now escaped

Signed-off-by: Amit Gupta <amit.gupta@informaticsglobal.com>
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 5ae18484b5a47e8a00ce8f1a0fd8b3db471947eb)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>