pgstatsinfo - pg_statsinfo: - Merge sources of stats_info of 8.3 and

Log Message:
-----------
- Merge sources of stats_info of 8.3 and 8.4, and doen a few code cleanup.

Modified Files:
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pg_statsinfo/pg_statsinfo/stats_info:
Makefile (r1.1.1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/pg_statsinfo/stats_info/Makefile?r1=1.1.1.1&r2=1.2)
stats_info_sql.h (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/pg_statsinfo/stats_info/stats_info_sql.h?r1=1.5&r2=1.6)