LinuxServer Changes:
Correct Name, Hydra2 -> NZBHydra2.
nzbhydra2 Changes:
v2.20.0 (2020-04-26)
Feature Option to filter out results by language. Very few indexers provide the language in the results, though.
Feature You can now add self-signed certificates for any hosts you want to connect to. Just create a folder named 'certificates' inside the data folder, put your .crt files there and reload NZBHydra.
Feature Option to disable SSL verification for local hosts. (This was on by default so far).
Feature Support for saving NZBs to a black hole.
Fix Fix sorting by age in download history.
Fix NZBGet connection didn't honor SSL verification settings.
Fix Properly display last errror on indexer statuses page.
Fix Fix parsing of binsearch date on non-english locales.
Fix Properly recognize duplicate NZBs not added to sabNZBd.
Fix Improve matching of downloads to downloader entries where no external ID exists, i.e. those downloads resulting from API accesses.
Fix When using NZBGet the wrong NZB would be shown as downloading if the first entry in the queue wasn't the one downloading.
Fix Handle errors better while adding torrents to black hole or sending magnet links.
Fix Filter out quotation marks (") when searching NZBGeek.
Note I've added two settings for the database. Just ignore them unless told otherwise ;-)