openssh: Securiry fix for CVE-2023-38408

openssh: Securiry fix for CVE-2023-38408

The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an
insufficiently trustworthy search path, leading to remote code
execution if an agent is forwarded to an attacker-controlled system.
(Code in /usr/lib is not necessarily safe for loading into ssh-agent.)
NOTE: this issue exists because of an incomplete fix for CVE-2016-10009.

References:
https://nvd.nist.gov/vuln/detail/CVE-2023-38408

Upstream patches:
https://github.com/openssh/openssh-portable/commit/dee22129, https://github.com/openssh/openssh-portable/commit/099cdf59,
https://github.com/openssh/openssh-portable/commit/29ef8a04, https://github.com/openssh/openssh-portable/commit/892506b1,
https://github.com/openssh/openssh-portable/commit/0c111eb8, https://github.com/openssh/openssh-portable/commit/52a03e9f,
https://github.com/openssh/openssh-portable/commit/1fe16fd6, https://github.com/openssh/openssh-portable/commit/e0e8bee8,
https://github.com/openssh/openssh-portable/commit/8afaa7d7, https://github.com/openssh/openssh-portable/commit/1a4b9275,
https://github.com/openssh/openssh-portable/commit/4c1e3ce8, https://github.com/openssh/openssh-portable/commit/1f2731f5.

Signed-off-by: Shubham Kulkarni <skulkarni@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>