Unix: Fix ProgVal/Limnoria#256

Unix.wtf now sends errors to IRC.

```
14:15:44 <@Mikaela> +whatis asdfhaerhyasfh
14:15:47 <@Tessu> Gee... I don't know what asdfhaerhyasfh means...
```

This is the same message which you would get by running `wtf` directly from terminal.