Index USING in pg_dump

The following patch supresses "USING btree" for btree indexes in
pg_dump:

CREATE INDEX ii ON test (x);

CREATE INDEX kkas ON test USING hash (x);

This is possible because btree is the default. TODO item is:

* Remove USING clause from pg_get_indexdef() if index is btree (Bruce)

--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
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