Bug 20945: Escape SQL parameters when constructing download links

Bug 20945: Escape SQL parameters when constructing download links

TO test:
1 - Create a report that takes a parameter
2 - Enter a parameter containing '%'
3 - Attempt to download report, note link is misconstructed
4 - Apply patch
5 - Reload
6 - Note URL is now correct

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>