add even more special mappings

[winterbird-code]

This is the last of the special bunch for now; next will probably be either more movie mappings or (if I feel really, really patient) trying to map the pokemon series...

AniDB	TVDB/TMDB/IMDB	Notes
https://anidb.net/anime/5549	https://thetvdb.com/index.php?tab=series&id=81807	Add specials
https://anidb.net/anime/9304	https://thetvdb.com/index.php?tab=series&id=262954	Add specials
https://anidb.net/anime/13217	https://thetvdb.com/index.php?tab=series&id=334706	Add specials
https://anidb.net/anime/15421	https://thetvdb.com/index.php?tab=series&id=385077	Add specials

[BrutuZ]

Sorry for hijacking the PR to sneak in that Tonikawa remap. TVDB removed the stand-alone entry and moved it into the main entry's specials