make it possible to pass a hash of options for further configuration

manifests/instance.pp

@@ -9,6 +9,7 @@ define tinc::instance(
   $port_to_export           = '655',
   $compression              = '10',
   $mode                     = 'switch',
+  $options                  = {},
   $tinc_up_content          = undef,
   $tinc_down_content        = undef,
 ){

manifests/switch.pp

@@ -12,6 +12,7 @@ define tinc::switch(
   $tinc_internal_netmask    = 'absent',
   $tinc_bridge_interface    = 'absent',
   $compression              = '10',
+  $options                  = {},
   $shorewall_zone           = 'absent'
 ){
 
@@ -25,6 +26,7 @@ define tinc::switch(
     port_to_export         => $port_to_export,
     compression            => $compression,
     mode                   => 'switch',
+    options                => $options,
   }
 
   if $ensure == 'present' {

templates/tinc.conf-header.erb

@@ -1,9 +1,10 @@
 Name = <%= @fqdn_tinc %>
 AddressFamily = ipv4
 Device = /dev/net/tun
-#PMTU = 1440
 Mode = <%= @mode %>
 
 BindToAddress = <%= @host_address %> <%= @port %>
 BindToInterface = <%= @tinc_interface.to_s %>
-
+<% @options.keys.sort.each do |key| -%>
+<%= key %> = <%= @options[key] %>
+<% end -%>