- Upgrade to 7.7p1 (bsc#1094068)

- Upgrade to 7.7p1 (bsc#1094068)
Most important changes (more details below):
* Drop compatibility support for pre-2001 SSH implementations
* sshd(1) does not load DSA keys by default
Distilled upstream log:
---- Potentially-incompatible changes
* ssh(1)/sshd(8): Drop compatibility support for some very old
SSH implementations, including ssh.com <=2.* and OpenSSH <=
3.*. These versions were all released in or before 2001 and
predate the final SSH RFCs. The support in question isn't
necessary for RFC-compliant SSH implementations.
---- New Features
* experimental support for PQC XMSS keys (Extended Hash-Based
Signatures), not compiled in by default.
* sshd(8): Add a "rdomain" criteria for the sshd_config Match
keyword to allow conditional configuration that depends on
which routing domain a connection was received on (currently
supported on OpenBSD and Linux).
* sshd_config(5): Add an optional rdomain qualifier to the
ListenAddress directive to allow listening on different
routing domains. This is supported only on OpenBSD and Linux
at present.
* sshd_config(5): Add RDomain directive to allow the
authenticated session to be placed in an explicit routing
domain. This is only supported on OpenBSD at present.
* sshd(8): Add "expiry-time" option for authorized_keys files
to allow for expiring keys.
* ssh(1): Add a BindInterface option to allow binding the (forwarded request 611002 from pcerny)