weppos/whois — pull request #350 by jrideout (2014-09-10 05:20:27+00:00)
Title: Fix the ARIN referral regex to correctly consider ports optional

I ran into a problem with 144.134.121.81. It contains this referral string:

```
ReferralServer: whois://whois.apnic.net
```

However, the current regex requires a port like `:43`