Search rooms

Full-text room search. Pass the query and options as query params here: ?q= (query), ?l= (limit), ?o= (offset), ?s= (sort), ?rt= (room type). The same handler also answers a positional path form for convenience, /search/{q}, /search/{q}/{l}, and so on up to /search/{q}/{l}/{o}/{s}/{rt}, filling those five slots left to right. An empty result set is a 204, not an empty 200.