The new parser is almost RFC 6265 compliant as the previous
implementation but has some extensions:
- It can parse double-quoted values with unsafe characters inside
escaped with the backslash.
- It parses a date value of the expires attribute in the way the RFC
describes, with an exception that it allows omission of the seconds
field. Some of the broken date representations that used to pass
are now treated as error and ignored.
- It can parse a Set-Cookie value that contains multiple cookie
definitions separated by comma, and commas put inside double quotes
are not mistaken as definition separator.
