OpenSSH 10.4 released

OpenSSH 10.4 has been released. In addition to a number of securityand bug fixes, there are a few notable changes; this release addsexperimental support for a composite post-quantum signature schemecombining ML-DSA 44 and Ed25519 as described in thisIETF draft. With 10.4, if OpenSSH is compiled with sandbox supportit will fail on Linux systems that have not enabled SECCOMPor NO_NEW_PRIVS; prior to this release, sshd would log an errorbut continue operation. See the release notes fora full list of changes.