Add points to servers with a domain name

[ShadowNinja]

Rationale:

• Servers with registered domains are more likely to stick around for a while.
• Requiring a (non-free) registered domain to rank highly on the list means that servers that send falsified data can be more effectively banned or at least kept low on the list.

This also adds new options:

• banned domain suffixes: You can ban a specific domain or an entire suffix like .bad-servers.net so that servers can't just change subdomains, they would have to buy a new domain to evade the ban.
• "irreputable" domain suffixes that shouldn't get the extra points: free domains like .tk can be added to this list so that legitimate servers can still use them (albeit with a lower ranking) but servers that are trying to game the rankings will need to pay for a domain to evade bans.

A quick check of the server list showed that most of the top-ranking servers already have non-free domains, (and most of the ones that don't have domains are MultiCraft servers). So this shouldn't change the ranking too much.

[sfan5]

:-1: from me, don't think it matters

Edit: didn't mean to close but it's probably the fate of this anyway.