Improve error handling when client trying to connect using SSL and the server is not using SSL

[saidelike]

Atm the server shows:

[ERROR] (10.131.108.194:37519) Expecting value: line 1 column 1 (char 0)
Traceback (most recent call last):
  File "/home/user/IDArling/idarling/shared/sockets.py", line 199, in _notify_read
    dct = json.loads(line.decode("utf-8"))
  File "/usr/lib/python3.6/json/__init__.py", line 354, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python3.6/json/decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python3.6/json/decoder.py", line 357, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
[WARNING] (10.131.108.194:37519) Invalid packet received: bytearray(b'\x00\x1d\x00\x17\x00\x1e\x00\x19\x00\x18\x00#\x00\x00\x00\x16\x00\x00\x00\x17\x00\x00\x00\r\x000\x00.\x04\x03\x05\x03\x06\x03\x08\x07\x08\x08\x08\t\x08')
[ERROR] (10.131.108.194:37519) Expecting value: line 1 column 1 (char 0)

And the client does not show any error and just hangs on "connecting..."

So we need better error handling