CLSA-2026-1776444688 openssh: Fix of 3 CVEs

CVE-2026-35387: correctly match ECDSA signature algorithms against HostKeyAlgorithms, PubkeyAcceptedAlgorithms and HostbasedAcceptedAlgorithms - CVE-2026-35388: add missing askpass check when using ControlMaster=ask/autoask and "ssh -O proxy ..." - CVE-2026-35414: fix authorizedkeys principals...