This class is for objects that represent a "cookie jar" -- that is, a
database of all the HTTP cookies that a given LWP::UserAgent object knows
about.

Cookies are a general mechanism which server side connections can use to
both store and retrieve information on the client side of the connection.
For more information about cookies refer to
<URL:http://curl.haxx.se/rfc/cookie_spec.html> and
<URL:http://www.cookiecentral.com/>. This module also implements the new
style cookies described in _RFC 2965_. The two variants of cookies are
supposed to be able to coexist happily.

Instances of the class _HTTP::Cookies_ are able to store a collection of
Set-Cookie2: and Set-Cookie: headers and are able to use this information
to initialize Cookie-headers in _HTTP::Request_ objects. The state of a
_HTTP::Cookies_ object can be saved in and restored from files.