check internal redirections for loops, too

check internal redirections for loops, too

Now that we have the redirections loopchecker centrally in our items we
can use it also to prevent internal redirections to loop caused by
bugs as in a few instances we get into the business of rewriting the URI
we will query by ourself as we predict we would see such a redirect
anyway. Our code has no bugs of course, hence no practical difference. ;)

Gbp-Dch: Ignore