fix(icom net): the audio starts at once, not half a minute later

The conninfo that authorises the RX stream goes out during the login,
before the audio socket exists — it has to, since it is what authorises
it. So the rig is told to send audio to :50003 while nothing is bound
there, gets an ICMP port-unreachable back, backs off, and the audio turns
up only when its own retry timer comes round: twenty to thirty seconds by
the operator's watch, ninety in one log.

It is sent once more the moment the port is listening, which is the same
message the session already carries — RS-BA1 repeats it too. The audio
dial moved above the pumps, because after ctrlPump is running the
control-stream auth state belongs to it.

internal/cat/icomnet.go

@@ -857,20 +857,46 @@ func dialIcomNet(host, user, pass, compName string, rigAddr byte, cancel <-chan
 	n.vTracked++
 	n.vCivSeq++
 
-	go n.ctrlPump()
-	go n.civPump()
-
 	// Optional RX audio stream (50003). The rig was told (conninfo rxEnable=1) to
 	// stream audio; open the socket + handshake now. A failure here is NON-fatal:
 	// CAT works without audio, so we log and continue rather than tear down a
 	// perfectly good control/CI-V session.
+	//
+	// BEFORE the pumps start, because the conninfo below touches the control-
+	// stream auth state, and after ctrlPump is running that state belongs to it.
 	if wantAudio {
 		if a, err := dialIcomAudio(host, audioSink, cancel); err != nil {
 			debugLog.Printf("icom net: audio stream FAILED (CAT unaffected): %v", err)
 		} else {
 			n.audio = a
+			// AND THE CONNINFO AGAIN, NOW THAT SOMEBODY IS LISTENING ON 50003.
+			//
+			// The first one goes out during the login, before this socket exists —
+			// it has to, since it is what authorises the stream. So the rig is told
+			// to send audio to a port nothing is bound to yet, and what comes back
+			// is an ICMP port-unreachable; it then backs off, and the audio appears
+			// only when its own retry timer comes round. An operator timed that at
+			// twenty to thirty seconds of silence after switching the speakers on,
+			// and one log here shows a minute and a half.
+			//
+			// Re-sent once the port is open, so the rig starts streaming into a
+			// socket that is ready for it. Idempotent — the same message the session
+			// already carries, which is why RS-BA1 repeats it too.
+			pkt := icnConnInfo(n.cTracked, n.cAuthSeq, n.cTokReq, n.cID, n.cRemote, n.cToken, user, rigMAC, 50002, 50003, 0x01)
+			n.cSentBuf[n.cTracked] = pkt
+			n.cTracked++
+			n.cAuthSeq++
+			if _, err := ctrl.Write(pkt); err != nil {
+				debugLog.Printf("icom net: could not re-send the conninfo after opening the audio port: %v", err)
+			} else {
+				debugLog.Printf("icom net: conninfo re-sent now that :50003 is listening — the rig can start the audio at once")
+			}
 		}
 	}
+
+	go n.ctrlPump()
+	go n.civPump()
+
 	return n, nil
 }