This matches the logic we have for the Authorization header as well
as the impersonation headers.
Signed-off-by: Monis Khan <mok@microsoft.com>
Kubernetes-commit: e9866d2794675aa8dc82ba2637ae45f9f3a27dff
This flag is documented as being case-insensitive, but the code was
doing a case-sensitive map lookup.
Kubernetes-commit: 0acdc0cdb369372e06c202aea162bce04410f643
Stanislav Láznička