plugin linux_netfilter: add handle (nf-id) to rule

Author: superstes

src/firewall_test/plugins/translate/netfilter/elements.py

@@ -441,6 +441,9 @@ def __repr__(self) -> str:
         if self.comment is not None:
             cmt = f' "{self.comment}"'
 
+        if self.handle is not None:
+            cmt += f' (handle {self.handle})'
+
         matches = str(self.matches)
         if len(matches) > 500:
             matches = matches[:500] + '...'