Replace rdate/rtime by rdatetime.

src/cdi.h

src/stream.c

src/stream_cdf_i.c

src/stream_cdf_time.c

src/stream_cgribex.c

src/stream_ext.c

src/stream_gribapi.c

src/stream_gribapi.h

src/stream_ieg.c

src/stream_srv.c

src/taxis.c