add new rules

manifests/rules/out/mysql.pp

+# manage outgoing mysql
+class firewall::rules::out::mysql {
+  include firewall
+  if $firewall::use_nftables {
+    include nftables::rules::out::mysql
+  } else {
+    include shorewall::rules::out::mysql
+  }
+}

manifests/rules/out/postgres.pp

+# manage outgoing postgres
+class firewall::rules::out::postgres {
+  include firewall
+  if $firewall::use_nftables {
+    include nftables::rules::out::postgres
+  } else {
+    include shorewall::rules::out::postgres
+  }
+}