[Patch] permit redirections to data urls

[Leo Savernik]

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Hello,

Data urls strike again. It's becoming a pita.

The problem is about images that are represented by data urls. If the html 
file containing them is a local file, the embedded images load flawlessly. 
However, if the html is served over http, the data urls are not even loaded.

Look at:
http://bugs.kde.org/attachment.cgi?id=2478&action=view

for the http test case, and the attachment for the local one.

After intensive investigations I found KApplication::authorizeURLAction to be 
responsible. Therefore, I added a rule to 
KApplication::initUrlActionRestrictions to explicitly permit redirections 
from any url to data urls.

Data urls itself are still only allowed to redirect to their own kind (at 
least if I'm understanding the url action restrictions right, otherwise funny 
exploits could be created).

Please review this patch:
http://bugs.kde.org/attachment.cgi?id=2482&action=view

mfg
	Leo


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