Merge #9720: net: fix banning and disallow sending messages before receiving verack

d943491 qa: add a test to detect leaky p2p messages (Cory Fields)
8650bbb qa: Expose on-connection to mininode listeners (Matt Corallo)
5b5e4f8 qa: mininode learns when a socket connects, not its first action (Matt Corallo)
cbfc5a6 net: require a verack before responding to anything else (Cory Fields)
8502e7a net: parse reject earlier (Cory Fields)
c45b9fb net: correctly ban before the handshake is complete (Cory Fields)

qa/pull-tester/rpc-tests.py

@@ -154,6 +154,7 @@ testScripts = [
     'bumpfee.py',
     'rpcnamedargs.py',
     'listsinceblock.py',
+    'p2p-leaktests.py',
 ]
 if ENABLE_ZMQ:
     testScripts.append('zmq_test.py')