pgsql: Pass modern COPY syntax to backend, since copy (query) does not

Log Message:
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Pass modern COPY syntax to backend, since copy (query) does not accept old syntax. Per complaint from Michael Fuhr.

Tags:
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REL8_2_STABLE

Modified Files:
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pgsql/src/bin/psql:
copy.c (r1.71 -> r1.71.2.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/copy.c.diff?r1=1.71&r2=1.71.2.1)