clightning: add netns

- Adds clightning to netns-isolation.services
- Adds bitcoin-rpcconnect option to allow using clightning with network
  namespaces
- Uses bind-addr option (defaults to localhost) as target of hidden service
- Adds different bind-addr options depending on if netns-isolation is
  enabled or not.

modules/netns-isolation.nix

@@ -88,6 +88,10 @@ in {
         bitcoind = {
           id = 12;
         };
+        clightning = {
+          id = 13;
+          connections = [ "bitcoind" ];
+        };
       };
 
       systemd.services = {
@@ -181,9 +185,17 @@ in {
         '';
       };
 
+      # clightning: Custom netns configs
+      services.clightning = mkIf config.services.clightning.enable {
+        bitcoin-rpcconnect = netns.bitcoind.address;
+        bind-addr = "${netns.clightning.address}:${toString config.services.clightning.onionport}";
+      };
+
     })
     # Custom netns config option values if netns-isolation not enabled
     (mkIf (!cfg.enable) {
+      # clightning
+      services.clightning.bind-addr = "127.0.0.1:${toString config.services.clightning.onionport}";
     })
   ];
 }