[COMMITTERS] pgsql: Document the fact that COPY always uses the client encoding.

[Andrew Dunstan]

Log Message:
-----------
Document the fact that COPY always uses the client encoding.

Modified Files:
--------------
    pgsql/doc/src/sgml/ref:
        copy.sgml (r1.80 -> r1.81)
        
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/copy.sgml?r1=1.80&r2=1.81)

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