postfix.init.pp: Finally found the right options for the bind mount.

postfix/manifests/init.pp

@@ -141,16 +141,13 @@ class postfix {
             group => "root",
         }
         mount { "/var/spool/postfix/var/run/saslauthd":
-            name => "/var/run/saslauthd",
             ensure  => mounted,
             atboot  => true,
-            device  => "none",
-            fstype  => "tmpfs",
-            options => "uid=postfix,gid=postfix,mode=0710",
+            device => "/var/run/saslauthd",
+            options => "bind",
+            fstype => "bind",
             dump    => "0",
             pass    => "0",
-            require => File["/var/spool/postfix/var/run/saslauthd"],
-            before  => Service["postfix"],
         }
     }