If the value to be matched in the Queries/Headers matchers is empty, only
verify the presence of the key and ignore the value.
Idea from:
http://groups.google.com/group/gorilla-web/browse_thread/thread/3330846009499538
Original issue reported on code.google.com by rodrigo.moraes on 25 Sep 2011 at 5:29
Original issue reported on code.google.com by
rodrigo.moraes
on 25 Sep 2011 at 5:29