NewParser returns a new filtering-rule parser.

DefaultRuleBufSize is the default length of a buffer used to read a line with a filtering rule, in bytes.

ErrHTML is returned by [Parser.Parse] if the data is likely to be HTML.

Parser is a filtering-rule parser that collects data, such as the checksum and the title, as well as counts rules and removes comments.

ParseResult contains information about the results of parsing a filtering-rule list by [Parser.Parse].