test: Add explicit onion bind to p2p_permissions

When the bind option is replaced in the bitcoin.conf, bitcoind will
attempd to bind to the default tor listening port. If another bitcoind
is running that is already bound to that port, the bind will fail which,
since bitcoin#22729, causes the test to fail.

This failure can be avoided by explicitly binding the tor port when the
bind is removed.

test/functional/p2p_permissions.py

@@ -14,8 +14,10 @@
 from test_framework.test_node import ErrorMatch
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
+    append_config,
     assert_equal,
     p2p_port,
+    tor_port,
 )
 from test_framework.wallet import MiniWallet
 
@@ -57,11 +59,14 @@ def run_test(self):
         # by modifying the configuration file.
         ip_port = "127.0.0.1:{}".format(p2p_port(1))
         self.nodes[1].replace_in_config([("bind=127.0.0.1", "whitebind=bloomfilter,forcerelay@" + ip_port)])
+        # Explicitly bind the tor port to prevent collisions with the default tor port
+        append_config(self.nodes[1].datadir_path, [f"bind=127.0.0.1:{tor_port(self.nodes[1].index)}=onion"])
         self.checkpermission(
             ["-whitelist=noban@127.0.0.1"],
             # Check parameter interaction forcerelay should activate relay
             ["noban", "bloomfilter", "forcerelay", "relay", "download"])
         self.nodes[1].replace_in_config([("whitebind=bloomfilter,forcerelay@" + ip_port, "bind=127.0.0.1")])
+        self.nodes[1].replace_in_config([(f"bind=127.0.0.1:{tor_port(self.nodes[1].index)}=onion", "")])
 
         self.checkpermission(
             # legacy whitelistrelay should be ignored