test: remove default argument of feature_proxy.py:node_test()

The default bool argument makes it harder to read because the last but
one argument is also bool. Pass all of them as named arguments to
increase readability.

Another bool argument will be added to indicate whether to test CJDNS.

Co-authored-by: Jon Atack <jon@atack.com>

test/functional/feature_proxy.py

@@ -114,7 +114,7 @@ def network_test(self, node, addr, network):
             if peer["addr"] == addr:
                 assert_equal(peer["network"], network)
 
-    def node_test(self, node, proxies, auth, test_onion=True):
+    def node_test(self, node, *, proxies, auth, test_onion):
         rv = []
         addr = "15.61.23.23:1234"
         self.log.debug(f"Test: outgoing IPv4 connection through node for address {addr}")
@@ -180,20 +180,28 @@ def node_test(self, node, proxies, auth, test_onion=True):
 
     def run_test(self):
         # basic -proxy
-        self.node_test(self.nodes[0], [self.serv1, self.serv1, self.serv1, self.serv1], False)
+        self.node_test(self.nodes[0],
+            proxies=[self.serv1, self.serv1, self.serv1, self.serv1],
+            auth=False, test_onion=True)
 
         # -proxy plus -onion
-        self.node_test(self.nodes[1], [self.serv1, self.serv1, self.serv2, self.serv1], False)
+        self.node_test(self.nodes[1],
+            proxies=[self.serv1, self.serv1, self.serv2, self.serv1],
+            auth=False, test_onion=True)
 
         # -proxy plus -onion, -proxyrandomize
-        rv = self.node_test(self.nodes[2], [self.serv2, self.serv2, self.serv2, self.serv2], True)
+        rv = self.node_test(self.nodes[2],
+            proxies=[self.serv2, self.serv2, self.serv2, self.serv2],
+            auth=True, test_onion=True)
         # Check that credentials as used for -proxyrandomize connections are unique
         credentials = set((x.username,x.password) for x in rv)
         assert_equal(len(credentials), len(rv))
 
         if self.have_ipv6:
             # proxy on IPv6 localhost
-            self.node_test(self.nodes[3], [self.serv3, self.serv3, self.serv3, self.serv3], False, False)
+            self.node_test(self.nodes[3],
+                proxies=[self.serv3, self.serv3, self.serv3, self.serv3],
+                auth=False, test_onion=False)
 
         def networks_dict(d):
             r = {}