old version compatible invalid bug

My remote server install from pip, it's version is 1.6.1. The local version is 1.7a. when i use the -c option connect to the remote server and then use the key 'h', display error 

because hddtemp is added after the 1.6.1 support, so this option local has, but the remote server does not. This is have wrong version verification, client_version [: 2]  always has been "1.", there is no effect, so now is client_version [: 3]. 

Moreover self.client.init () returns is the version number, 

```
client_version = self.client.init () [: 3] 
```
meaningless because The results of the above code execution is a string.