Changed the return type of request_data() and related functions from DDS & to DDS *.
Changed the return type of request_data() and related functions from DDS & to
DDS *.


OPENDAP/libdap4,OPENDAP/libdap,OPENDAP/libdap4,OPENDAP/libdap,OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap,OPENDAP/libdap