Returns the htu of a gateway proof: the HTTPS form of the gateway URL
(GatewayIdentify.dpop, 04 6.3 step 3), also when the server speaks clear text behind a TLS
terminator or on loopback; a default port (80 of ws, 443 of wss) is dropped, query and
fragment are removed (docs/DECISIONS.md D-M2-29-3).
Returns the
htuof a gateway proof: the HTTPS form of the gateway URL (GatewayIdentify.dpop, 04 6.3 step 3), also when the server speaks clear text behind a TLS terminator or on loopback; a default port (80ofws,443ofwss) is dropped, query and fragment are removed (docs/DECISIONS.md D-M2-29-3).