Bug 17114: Fix XSS in picture-upload.pl

Bug 17114: Fix XSS in picture-upload.pl

To reproduce:
1/ cp your_image.jpg 'test<svg onload=alert(1)>.jpg'
2/ Use the upload picture tool to upload this file
=> Without this patch, the alert is show
=> With this patch, the filename is correctly displayed and no alert

Note that the cardnumber var was not escaped neither, it's now.

Signed-off-by: Colin Campbell <colin.campbell@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>