LEDGE-237: use ordinary field instead of AtomicReference. Seems to work
well enough.
LEDGE-237: Use RequestDispatcher to re-route request.
LEDGE-237: return empty list on null query string
LEDGE-237: deal with encoding inside formatQueryString function.
LEDGE-237: non-standard ports are already included in Host header
LEDGE-237: include servletPath in the URI, and include pathInfo
conditionally