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)