add a few more rules

manifests/rules/smtp.pp

+# manage incoming smtp
+class firewall::rules::smtp {
+  include firewall
+  if $firewall::use_nftables {
+    include nftables::rules::smtp
+  } else {
+    include shorewall::rules::smtp
+  }
+}

manifests/rules/smtp_submission.pp

+# manage incoming smtp submission
+class firewall::rules::smtp {
+  include firewall
+  if $firewall::use_nftables {
+    include nftables::rules::smtp_submission
+  } else {
+    include shorewall::rules::smtp_submission
+  }
+}

manifests/rules/smtps.pp

+# manage incoming smtps
+class firewall::rules::smtps {
+  include firewall
+  if $firewall::use_nftables {
+    include nftables::rules::smtps
+  } else {
+    include shorewall::rules::smtps
+  }
+}