Log Message:-----------Add sequence accessors to varchar and bpchar.
Uses text_as_sequence, and thus text(varlena) functions.
Modified Files:-------------- be/src/type: textual.c (r1.5 -> r1.6) (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/type/textual.c.diff?r1=1.5&r2=1.6)
