tracing: add misbehaving conn tracepoint

doc/tracing.md

@@ -128,6 +128,15 @@ Arguments passed:
 4. Network the peer connects from as `uint32` (1 = IPv4, 2 = IPv6, 3 = Onion, 4 = I2P, 5 = CJDNS). See `Network` enum in `netaddress.h`.
 5. Connection established UNIX epoch timestamp in seconds as `uint64`.
 
+#### Tracepoint `net:misbehaving_connection`
+
+Is called when a connection is misbehaving. Passes the peer id and a
+reason for the peers misbehavior.
+
+Arguments passed:
+1. Peer ID as `int64`.
+2. Reason why the peer is misbehaving as `pointer to C-style String` (max. length 128 characters).
+
 ### Context `validation`
 
 #### Tracepoint `validation:block_connected`