libpqtypes - libpqtypes: added man page link for PQparamDup, links to

Log Message:
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added man page link for PQparamDup, links to PQparamCreate.3 man page

Added Files:
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libpqtypes/docs/man3:
PQparamDup.3 (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/docs/man3/PQparamDup.3?rev=1.1&content-type=text/x-cvsweb-markup)