Create detect_kippo.rb - Detect Kippo SSH Honeypots

First contribution to Metasploit. probably sucks, feel free to make suggestions, etc.
From what I see here, you are simply sending back the server's SSH banner, indicating that you as a supposed SSH client are utilizing an SSH client that supports the same protocol and has the same banner as the server.  I'm not sure about Kippo, but at least with regular OpenSSH, you'll get ```protocol mismatch``` when the initial protocol negotiation fails, like here where I neglect to send a a client software version (```SSH-<protoversion>-<softwareversion>```):

```
$  telnet localhost 22
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
SSH-2.0-OpenSSH_5.9p1 Debian-5ubuntu1.4
SSH-2.0- 
Protocol mismatch.
Connection closed by foreign host.
```