Relax permissions

These files do not contain sensitive data, so keep the default files
permissions.

manifests/files.pp

@@ -39,7 +39,7 @@ class postfix::files {
   file { '/etc/mailname':
     ensure  => 'file',
     content => "${::fqdn}\n",
-    mode    => '0640',
+    mode    => '0644',
     seltype => $postfix::params::seltype,
   }
 
@@ -66,7 +66,7 @@ class postfix::files {
     ensure  => 'file',
     content => $mastercf_content,
     group   => 'root',
-    mode    => '0640',
+    mode    => '0644',
     owner   => 'root',
     seltype => $postfix::params::seltype,
     source  => $mastercf_source,