Setup backup server configuration for backup replication.

templates/home/backup/.ssh/config.j2

@@ -0,0 +1,7 @@
+{% for client in backup_clients %}
+Host {{ client }}
+    HostName {{ backup_host }}
+    Port {{ backup_ssh_port }}
+    User {{ backup_clients[client].owner }}
+    IdentityFile {{ backup_home }}/.ssh/{{ client }}
+{% endfor %}