plproxy - plproxy: set client_encoding in regtest before non-ascii

Log Message:
-----------
set client_encoding in regtest before non-ascii comments

Modified Files:
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plproxy/expected:
plproxy_encoding.out (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plproxy/plproxy/expected/plproxy_encoding.out.diff?r1=1.4&r2=1.5)
plproxy/sql:
plproxy_encoding.sql (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plproxy/plproxy/sql/plproxy_encoding.sql.diff?r1=1.3&r2=1.4)