OptionalalwaysOptionalcacheWhere to cache downloaded database files.
OptionalcheckinCheck for new version, even if we are in CI. Mostly useful for testing.
OptionalprefixURL prefix for Unicode Database. Filename is appended to this to get full URL.
OptionalverboseEnable verbose logging to stdout.
Parse the file, even if you get a 304 from the web server. Changes the status to 200 in this case.