* [feature] Discover webfinger through host-meta
This implements a fallback for discovering the webfinger endpoint in
case the /.well-known/webfinger endpoint wasn't properly redirected.
Some instances do this because the recommendation used to be to use
host-meta for the webfinger redirect in the before times.
Closes#1558.
* [bug] Ensure we only ever update cache on success
* [chore] Move finger tests to their own place
This adds a test suite for transport and moves the finger cache tests
into there instead of abusing the search test suite.
* [chore] cleanup the test a bit more
We don't really need a separate function for the oddly located webfinger
response as we check the full URL string anyway
* Address review comments
* [chore] update config example
* [chore] access DB only through state in controller
* Add local user and post count to nodeinfo responses
This fixes#1307 (at least partially). The nodeinfo endpoint should now
return the total users on an instance, along with their post count.
* Update NodeInfoUsers docstring and swagger yaml file
* start centralizing negotiation logic for API
* swagger document nodeinfo endpoint
* go fmt
* document negotiate function
* use content negotiation
* tidy up negotiation logic
* negotiate content throughout client api
* swagger
* remove attachment on Content
* add accept header to test requests
