Fix checks for relative redirects

[aderuwe]

Maybe it's me doing something wrong, but I think calling locatePath() on the expected URL breaks checks on relative redirects.

[stof]

In which case is it broken ?

[aderuwe]

When $header is a relative redirect to /some/url then calling locatePath() on the expected one prepends the base_url configuration option, making the match fail. Maybe the solution is to instead call locatePath() on $header as well?

[aderuwe]

Ping @stof

Does my comment make sense or am I doing something wrong?

[ricoli]

:+1: failing here too