Add statusRewrites (401 -> 302) to the ForwardAuth with Errors
middleware configuration and a troubleshooting note explaining that
without it, browsers may show a "Found." link instead of
auto-redirecting to the identity provider.
Fixes#3359
Signed-off-by: Nick Nikolakakis <nonicked@protonmail.com>
Signed-off-by: Jan Larwig <jan@larwig.com>
Co-authored-by: Jan Larwig <jan@larwig.com>
