In master, this this what happens when a connection is closed
and server runs with `-D`
```
[95023] 2020/06/03 14:55:28.395532 [DBG] 127.0.0.1:54077 - cid:2 - Client connection created
[95023] 2020/06/03 14:55:29.164118 [DBG] 127.0.0.1:54077 - cid:2 - Client connection closed: Client Closed
[95023] 2020/06/03 14:55:29.164191 [DBG] 127.0.0.1:54077 - cid:2 - Client connection closed
```
Notice the trace of connection closed with the reason, and then
the bare connection closed statement.
This double trace was introduced by mistake during the JS branch
work (dd116fcfd4 (diff-853eb184ac73cf9597d7833f6b89e9c9R3547))
Signed-off-by: Ivan Kozlovic <ivan@synadia.com>