Expand the list of known Bitly domains

[specious]

bitly-client relies on a list of known Bitly domains to know when to expand a shortlink rather than shorten a URL.

I wrote a utility for checking domains to see if they are Bitly short domains:

$ ./check-bitly.sh bit.ly j.mp red.ht amazon.com duke.com
✔ bit.ly is a Bitly domain
✔ j.mp is a Bitly domain
✔ red.ht is a Bitly domain
✖ amazon.com is not a Bitly domain
✖ duke.com is not a Bitly domain

Please contribute domains that are not yet in the list!