PAS-18: Extract interesting paths from Cookies

PAS-3 introduced a mechanism for locating paths marked as "interesting" within HTTP requests (including referer) headers.

However, as noted here - http://projects.bentasker.co.uk/jira_projects/browse/PAS-3.html#comment1298875 - it may also be possible to extract interesting information from cookie values.

The way in which the pattern matching is performed will need to be slightly different though, so should probably add an additional option for config.sh

Once paths are extracted, they should be added to interestingdomains-full.csv with the third column being "HTTP Cookie".

As in the LinkedIn example, it might be possible to extract a timestamp of the user visiting (or technically, leaving) that path, so should look at adding that as a 4th column