Add a bunch new steam scam domains

[Dougley]

Adds a bunch of new domains that are (actively) used to fake Steam trading URLs, this list was compiled by DMD.

Supersedes #101 (sorry bup)

[jagrosh]

This list does not support subdomains, so any of the *.com.ru or similar domains need to be removed from this list.

[Dougley]

They're technically second-level domains similarly to .co.uk for example. They're free to be registered like any other TLD, is there a technical reason why you're not supporting this?

[jagrosh]

The technical reason is that they just wouldn't do anything with how the code currently works; it iterates through all urls in a message and compared the base url to this list, so it would be comparing com.ru to something.com.ru which wouldn't match.

I guess there's no harm in including them, but it would be confusing for someone reading the source wondering why these links aren't being picked up despite being in this list.