[SSSD] [sssd PR#618][opened] Add an option to only print the host keys for sss_ssh_knownhostsproxy

[fidencio]

   URL: https://github.com/SSSD/sssd/pull/618
Author: fidencio
 Title: #618: Add an option to only print the host keys for sss_ssh_knownhostsproxy
Action: opened

PR body:
"""
Please, check the patchset.

Resolves:
https://pagure.io/SSSD/sssd/issue/3542
"""

To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/618/head:pr618
git checkout pr618