[🔺] IP getter is *still* broken

[Sv443]

IPs are still not being resolved sometimes which leads to the wrong people being rate limited.

Explanation:
The API tries to resolve the client's IP but if it can't find it or it is invalid, the API assigns a null constant as the client's IP address. If some other client, who also has a null IP address now sends 60 requests in a minute, all other clients with invalid / unresolvable IP addresses also get rate limited, since the API thinks their IP addresses are the exact same.

Also on a side note: I'm talking about hashed IP addresses. Your actual IP address is not known to me at any point nor is it visible in any logs.

[Sv443]

Changed milestone to hotfix version 2.1.4 since this has such a high priority.

[Sv443]

I found out what the issue is.
It's that the resolveIP module can only resolve IPv4 addresses and can't parse IPv6.
Additionally, some headers are incorrect (use _ instead of -) and some headers don't even exist anymore.
Very very quick fix would be to use the Cloudflare header cf-pseudo-ipv4 to get an IPv4 representation of the IPv6 address and to replace the _ with -.