Log Message:
-----------
Move libpq environment reference in psql documentation to a more
appropriate place, per Andrew Dunstan.

Modified Files:
--------------
    pgsql/doc/src/sgml/ref:
        psql-ref.sgml (r1.174 -> r1.175)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/psql-ref.sgml.diff?r1=1.174&r2=1.175)

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Next:	From: Neil Conway	Date: 2006-11-21 17:54:27
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	Subject: pgsql: remove duplicate declaration, per report from Magnus Hagander.