CVE-2026-59999: make DisableForwarding=yes override PermitTunnel=yes in
server_request_tun() (upstream 8dfe7ed6)
CVE-2026-60000: count postponed GSSAPI attempts against MaxAuthTries by
finishing auth in input_gssapi_errtok(), fixing a pre-auth resource DoS
(upstream 5d04ca6a)