Bug 17024: Fix XSS in tools/viewlog.pl

Bug 17024: Fix XSS in tools/viewlog.pl

Test plan:
    Hit /tools/viewlog.pl?do_it=1&modules=CATALOGUING&action=MODIFY&object=<script>alert("XSS")</script>

=> 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: Brendan Gallagher <brendan@bywatersolutions.com>
(cherry picked from commit f563ba795e4863328ff4930e7877caae9458206c)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
(cherry picked from commit 24664b719f9d09210f30d7f96fc025e08da8124e)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>