Server.Listeners + Upstream V4/V6

Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>

src/proxy/tests/client_tls_mtproto_fallback_security_tests.rs

@@ -47,6 +47,8 @@ fn build_harness(secret_hex: &str, mask_port: u16) -> PipelineHarness {
             enabled: true,
             scopes: String::new(),
             selected_scope: String::new(),
+            ipv4: None,
+            ipv6: None,
         }],
         1,
         1,