feat: create glauth module

- manage config directories, config file
- manage systemd service and socket
- manage users, service accounts and groups
- manage defaults for users, services and groups
- manage packages for role

modules/glauth/templates/backend.epp

@@ -0,0 +1,10 @@
+#################
+# The backend section controls the data store.
+[backend]
+  datastore = "<%= $backend_datastore %>"
+  baseDN = "<%= $backend_basedn %>"
+  nameformat = "<%= $backend_nameformat %>"
+  groupformat = "<%= $backend_groupformat %>"
+  anonymousdse = <%= $backend_anonymousdse %>
+  sshkeyattr = "<%= $backend_sshkeyattr %>"
+