Cleanup HTTP request error handling, noticed failed requests weren't logged correctly during RuneScape downtime.

Turns out the issue was Template:Hiscore error handling supressing the real error, leading to all visible errors being the too many user error.

Revert "Revert "Don't add unknown username errors to the RSHiScores error category, since inactive users are removed from the hiscores.""

This reverts commit 4cba6dd4.

Revert "Don't add unknown username errors to the RSHiScores error category, since inactive users are removed from the hiscores."

This reverts commit 86101300 as it causes the wrong error to be returned.

Don't add unknown username errors to the RSHiScores error category, since inactive users are removed from the hiscores.

Fix PHP warning caused by non-numeric parameters being passed, which are used as part of offsets by explode().

Switch to local server's object cache. Probably should still fix the WAN object cache, but this is good enough for now.

Handle when we get blacklisted

See merge request weirdgloop/rshiscores!2

Fix URLs

See merge request weirdgloop/rshiscores!1

- Fixes existing URLs
- Add support for ironman and hardcore ironman to rs3
- Add support for ironman and ultimate ironman to osrs
- Use modern array syntax, e.g. array() -> []
- Bump version to 3.2.0

Cleanup error handling by using Exceptions, proper error messages and logging failed requested. Switch from using cURL directly to using the MWHttpRequest wrapper.

Rename extension again, since Jagex changed the casing from Hiscores to HiScores. Cleanup licensing. Switch to modern extension registration.

Adjust URLs to point to the new wiki. Remove Wikia references. Finish rename from RSHighscores to RSHiscores.

Update docs

remove *-dev suffix from version, we can always check on Special:Version to see what's running and it's very rarely updated

Use messages when outputting errors instead of codes