smtpd: Fix mailer.conf for OpenBSD 5.9.

smtpd/manifests/init.pp

@@ -107,12 +107,12 @@ class smtpd(
       $mda = '/usr/local/bin/procmail -Y -t -f %{sender}'
 
       file { '/etc/mailer.conf':
-        ensure => present,
-        mode   => '0644',
-        owner  => 'root',
-        group  => 'wheel',
-        source => 'puppet:///modules/smtpd/mailer.conf',
-        before => Service[$service],
+        ensure  => present,
+        mode    => '0644',
+        owner   => 'root',
+        group   => 'wheel',
+        content => template('smtpd/mailer.conf.erb'),
+        before  => Service[$service],
       }
 
       service { 'sendmail':