[Feature] add /checkip command

[TehPeGaSuS]

This command could be useful to check the location of a IP that has been detected in a DNSBL, e.g.

Cheers

[k4bek4be]

Already done here:
unrealircd/unrealircd#79

[TehPeGaSuS]

Sorry. I thought that the BLCHECKcommand would only say in which DNSBL lists the IP would be found and wouldn't give any geoip information

[k4bek4be]

OK, I have misunderstood "location" as the DNSBL reply code.
Why should the command return info only about DNSBLed addresses and not any of them?

[TehPeGaSuS]

Well, the CHECKIP command could return info about any IP.
I was just giving an example of the utility.

[k4bek4be]

I'm waiting for geoip API to appear in unrealircd, to avoid loading my whois module (that is resource intensive) on every server. (I may create one myself if this is getting too long). This is also valid for the other request (#2).