Down: Strip HTTPS protocol from HTTPS URLs
Apparently http://downforeveryoneorjustme.com/ screws up on these, so it's
better to strip the HTTPS and treat them like normal HTTP URLs.
Merge pull request #73 from Heufneutje/fix-down-https

Down: Strip HTTPS protocol from HTTPS URLs
[Down] fix a typo
[Responses] add a boop
[WebUtils] fix extraHeaders appending
[URLFollow] fix imgur headers
[URLFollow] typo :S
[ChatMap] restrict allowed years for addYear
[URLFollow] add triggers, making it chainable
[Sed] be consistent with URLFollow