[FEATURE] Add Imgur authorization option

[floopybird]

Imgur often rejects attempts to download images with a redirect to an error indicating:

"error": "Authentication required",

Registration and client creation is free and fairly straightforward. https://apidocs.imgur.com/#authorization-and-oauth It would be great if there was a configuration option in bdfr to add the authorization header(s) necessary to avoid these auth required errors. Thanks!

[OMEGARAZER]

#828

[Serene-Arc]

Please don't link irrelevant issues.

Adding the API authorisation is on the list. I have a lot to do at the moment but I'll get there.

[OMEGARAZER]

Imgur often rejects attempts to download images with a redirect to an error indicating:

"error": "Authentication required",

Please don't link irrelevant issues.

Perfectly relevant to the error message they're receiving.