WHOIS output should include RPL_AWAY where applicable

```
 <slingamn> any interest in a RPL_WHOISAWAY numeric?
 <slingamn> to display away status in WHOIS output
 <grawity> doesn't that already exist?...
 <ilbelkyr> >> :tolkien.freenode.net 301 ilbelkyr ilbelkyr :brb
 <Sadie> yeah, we send RPL_AWAY with whois
```