CLSA-2026-1777378650 Fix CVE(s): CVE-2023-26604

SECURITY UPDATE: systemctl may pass arbitrary shell commands from a pager like more1 that does not honor LESSSECURE, allowing privilege escalation under sudo. - debian/patches/CVE-2023-26604.patch: set LESSSECURE=1 when invoking a pager, rename to SYSTEMDPAGERSECURE, gate insecure pagers behind...