Connection attributes lenths in HandshakeResponse packet are specified as num of characters, rather than as number of bytes (no replies)

Connection attribute key and value lenths in HandshakeResponse packet are specified as num of characters, rather than as number of bytes:

see:

MySql.Data.MySqlClient.NativeDriver.SetConnectAttrs()

lines:

string value = (string)property.GetValue(attrs, null);
connectAttrs += string.Format("{0}{1}", (char)name.Length, name);
connectAttrs += string.Format("{0}{1}", (char)value.Length, value);

.NET string.Length property returns number of characters, but here it is necessary to specify the lengths in bytes.