Because I got complaints about my old school nullable value checks being unreadable to others. 😔

…requency (#1172)

* Add setting for UDP ping frequency

* Reduce UDP logout period to 5 mins

* Fix ping timer calculation

* Retry UDP commands which failed with "UNKNOWN COMMAND"

* Change warning text for UNKNOWN COMMAND

…ints

- Reworked the internals to use the AniDB episode on the AniDB side when adding/removing AniDB ↔ TMDB movie links.

- Added new endpoints to link and unlink using the AniDB episode ID.

- Made is possible to also unlink a single episode when unlinking from the series link endpoint.

- Updated casing in log statements in the linking service.

- Fixed the purge logic for movies to work the same as the (previously fixed) show purge logic.

in export if comments are enabled.

…adata

This will prevent the same metadata entity from being updated concurrently, and will also ensure that a purge and update of the same metadata entity are not ran concurrently, which would be catastrophical.

my bad. sorry.

- Sped up the initial download of TMDB show metadata by first only fetching the _essential_ metadata, then scheduling a full refresh for later.
- Refactored staff member updates to use a more unified path across movies/shows.

- Misc. changes to the logging of show/movie updates.

- Other misc. changes I haven't mentioned above related to the tmdb metadata service.

instead of in milliseconds.

Closes #1174

…om them

when the length difference is zero.

I'll add multi-pass matching later, but for now, some optimizations to the simple waterfall logic we're using.

if we don't have the metadata locally or if we de a quick refresh previously.

…ng xrefs

so event consumers don't have to listen to both events and stitch it back together themselves.

and don't attempt to auto-match to match 'extras' at all.

…esult

since my last evilest commit forgot to add support for the thumbnails but added support for backdrops.

…because the web ui is hard coded to only use GET for global actions.

…ller

and also fix the remaining bugs (I could find) in the theme install/upload/update pipeline.

because triple pipes were overkill and a waste of available characters.

- Refactored the db to use new tables, now with more stored info per creator.

- Use the UDP api to get info about creators we're not getting from the HTTP anime XMLs, such as e.g. alternative names and images for staff members, or creator types for all creators to help distinguish the studios/companies from the staff members, etc.

if it's a css name without a theme definition.