URLs may contain a query string (prefixed with '?') and this should be ignored when parsing
the data format.
To facilitate testing this functionality, ParseDataFormat has been made non-static.
As RetFormat is now exposed in a header, it is renamed to the more
understandable RESTResponseFormat
-BEGIN VERIFY SCRIPT-
s() { sed -i 's/RetFormat/RESTResponseFormat/g' $1; }
s src/rest.cpp
s src/rest.h
-END VERIFY SCRIPT-
