Merge branch 'master' into next
Always unwrap the optional.
Revert "Don’t reregister a USK if it already is registered."

This reverts commit 502286e9afcad2ec3af1695af686ba6f671ba2ea.
Use a multimap to store trust relationships.
Don’t add anything if the Sone to add is already present and a local Sone.
Use fluent iterable for filtering.
Return a copy of the values.
Add detailed logging.
Add some more logging.
Copy known-flag from stored Sone to new Sone.
Don’t clobber local Sones.
Don’t try to get post if it doesn’t exist!
Add filter for empty albums.
Filter empty albums on gallery pages.
Fix navigation.
Add a static import for slightly more readable code.
Update latest edition of homepage.
Set version to 0.8.6.
Merge branch 'release-0.8.6'