UseCookie defines whether to use HTTP cookies during indexing.
Some sites may require cookies to crawl dynamic pages,
e.g. database driven documents, CGIs, etc.
Once indexer hits a dynamically created page,
the site can request setting up a cookie containing session id
or other kind of session information, and require
that cookie for each subsequent request to other dynamically created documents.
When UseCookie is set to yes,
indexer remembers all cookies set by the crawled sites in RAM, and uses
them for subsequent requests to the same servers (taking into account
the domain and path cookie attributes).
The default value is no.