WebOb: Open redirect in Location header normalization via leading C0 control / space characters

SummaryThis is a third follow-up to CVE-2024-42353 / GHSA-mg3v-6m49-jhp3and CVE-2026-44889 / GHSA-fh3h-vg37-cc95.WebOb makes the Location header absolute when it serves a redirect. To stop arelative or protocol-relative target from redirecting users off-host, it checksthe value for a URI scheme a...