* [chore] Remove years from all license headers
Years or year ranges aren't required in license headers. Many projects
have removed them in recent years and it avoids a bit of yearly toil.
In many cases our copyright claim was also a bit dodgy since we added
the 2021-2023 header to files created after 2021 but you can't claim
copyright into the past that way.
* [chore] Add license header check
This ensures a license header is always added to any new file. This
avoids maintainers/reviewers needing to remember to check for and ask
for it in case a contribution doesn't include it.
* [chore] Add missing license headers
* [chore] Further updates to license header
* Use the more common // indentend comment format
* Remove the hack we had for the linter now that we use the // format
* Add SPDX license identifier
* add missing license headers
* start adding instance peers get
* rename domainblock.go
* embed domain in domainblock so it can be reused
* update swagger docs
* add test instances to db
* update tests
* add/update instancepeersget
* update domain model
* add getinstancepeers to db
* instance-expose-peers, instance-expose-suspended
* add auth checks for both current filters
* attach endpoint to router
* include public comment
* obfuscate domain if required
* go mod tidy
* update swagger docs
* remove unnecessary comment
* return 'flat' peerlist if no query params provided
* start moving some database stuff around
* continue moving db stuff around
* more fiddling
* more updates
* and some more
* and yet more
* i broke SOMETHING but what, it's a mystery
* tidy up
* vendor ttlcache
* use ttlcache
* fix up some tests
* rename some stuff
* little reminder
* some more updates
