openssh: request support for Kerberos
The current package does not support Kerberos authentication.
The following options are not recognized in /etc/ssh/sshd_config:
- GSSAPIAuthentication yes
- GSSAPICleanupCredentials yes
This patch allows authentication with Kerberos (GSSAPI). It should also works for plain text password validation with Kerberos, but that's usually not what we want when speaking of Kerberos.
Patch provided for Alpine 3.12 main-openssh.patch