Revert recent COPY manual change about encoding; add mention of "server".

doc/src/sgml/ref/copy.sgml

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-$PostgreSQL: pgsql/doc/src/sgml/ref/copy.sgml,v 1.94 2010/02/23 05:17:33 momjian Exp $
+$PostgreSQL: pgsql/doc/src/sgml/ref/copy.sgml,v 1.95 2010/02/23 21:38:35 momjian Exp $
 PostgreSQL documentation
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@@ -367,10 +367,10 @@ COPY <replaceable class="parameter">count</replaceable>
    </para>
 
    <para>
-    <command>COPY</command> always processes data according to the
-    current client encoding, even if the data does not pass through
-    the client but is read from or written to a file directly by the
-    server.
+    Input data is interpreted according to the current client encoding,
+    and output data is encoded in the the current client encoding, even
+    if the data does not pass through the client but is read from or
+    written to a file directly by the server.
    </para>
 
    <para>