Have option to purge all urls under given url.

[null93]

On cache management page, have an option to purge all urls under a passed url. An example is as follows:

passing example.com/search.html to the purge url form will at the moment purge only any varnish cache that matches the url as a whole. With this additional checkbox to purge all urls under it, we will purge all urls trailing the given one. So urls like the following will be purged as well:

example.com/search.html/blah
example.com/search.html?term=blah

[null93]

Implementation should span to the console as well.