feat(nftables): Add NFTables integration for kernel-level forwarding and update documentation, tests, and helper functions

test/test.certificate-provisioning.ts

@@ -312,14 +312,8 @@ tap.test('SmartProxy: Should handle certificate provisioning through routes', as
     // Create a SmartProxy instance that can avoid binding to privileged ports
     // and using a mock certificate provisioner for testing
     const proxy = new SmartProxy({
-      // Use TestSmartProxyOptions with portMap for testing
+      // Configure routes
       routes,
-      // Use high port numbers for testing to avoid need for root privileges
-      portMap: {
-        80: 8080,  // Map HTTP port 80 to 8080
-        443: 4443  // Map HTTPS port 443 to 4443
-      },
-      tlsSetupTimeoutMs: 500, // Lower timeout for testing
       // Certificate provisioning settings
       certProvisionFunction: mockProvisionFunction,
       acme: {