pgsql: Attached is a patch that enhances the "\h" capability in psql.

Log Message:
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Attached is a patch that enhances the "\h" capability in psql. I often
find myself typing a command and then wanting to get the syntax for it.
So I do a ctrl-a and add a \h: but psql does not recognize the command,
because I have stuff attached to it (e.g. "alter table foobar"), so I
have to scroll over and delete everything except the name of the command
itself. This patch gives \h three chances to match: if nothing matches
the complete string (current behavior), it tries to match the first two
words (e.g. "ALTER TABLE"). If that fails, it tries to match the first
word (e.g. "DELETE").

Greg Sabino Mullane

Modified Files:
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    pgsql/src/bin/psql:
        help.c (r1.102 -> r1.103)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/help.c.diff?r1=1.102&r2=1.103)