upgrade openssh server package v8.6_p1-r{2->3} (CVE-2021-41617)
https://www.cve.org/CVERecord?id=CVE-2021-41617
https://git.alpinelinux.org/aports/commit/main/openssh?id=d10d87c0d9c31c3fe062e31ae65e3c05a8b6a060
https://github.com/fphammerle/docker-sftpd/commit/b8c194bb3b8c8b347644a32e8bbc44d9a5234621