Thread: pgsql: Add refentrytitle elements to refentry pages.

Log Message:
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Add refentrytitle elements to refentry pages.  Their absence confused the
man page tools somewhat.

Modified Files:
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    pgsql/doc/src/sgml:
        dblink.sgml (r1.5 -> r1.6)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/dblink.sgml?r1=1.5&r2=1.6)