* [feature] Allow users to set default interaction policies
* use vars for default policies
* avoid some code repetition
* unfuck form binding
* avoid bonkers loop
* beep boop
* put policyValsToAPIPolicyVals in separate function
* don't bother with slices.Grow
* oops
* update go-fed
* do the things
* remove unused columns from tags
* update to latest lingo from main
* further tag shenanigans
* serve stub page at tag endpoint
* we did it lads
* tests, oh tests, ohhh tests, oh tests (doo doo doo doo)
* swagger docs
* document hashtag usage + federation
* instanceGet
* don't bother parsing tag href
* rename whereStartsWith -> whereStartsLike
* remove GetOrCreateTag
* dont cache status tag timelineability
* Explain that markdown is enabled on the user settings page.
The current wording seems to imply that the input formatting can be
set on a per-post basis, which no client currently supports. It's not
clear that you have to go to the user settings page to change it.
* Update FAQ; some of the missing features are not missing any more!
