Do the "phrasification" for matching fields later during query parsing;
this allows for handling combination fields correctly.
Also match both the normal term and the "phrase term", so we catch more
cases. Update/extend unit tests.
This fixes the "kata-container" issue also for body test.
Fixes#2167.
Implement a new query parser; the results should be very similar to the
old one, but it adds an Sexp middle-representation, so users can see how
a query is interpreted.
