pgsql: Add contrib/pg_stat_statements for server-wide tracking of

Log Message:
-----------
Add contrib/pg_stat_statements for server-wide tracking of statement execution
statistics.

Takahiro Itagaki

Modified Files:
--------------
pgsql/contrib:
Makefile (r1.85 -> r1.86)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/Makefile?r1=1.85&r2=1.86)
README (r1.98 -> r1.99)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/README?r1=1.98&r2=1.99)
pgsql/doc/src/sgml:
contrib.sgml (r1.10 -> r1.11)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/contrib.sgml?r1=1.10&r2=1.11)
filelist.sgml (r1.58 -> r1.59)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/filelist.sgml?r1=1.58&r2=1.59)
pgsql/src/backend/postmaster:
postmaster.c (r1.569 -> r1.570)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/postmaster.c?r1=1.569&r2=1.570)
pgsql/src/include:
pgstat.h (r1.81 -> r1.82)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/pgstat.h?r1=1.81&r2=1.82)

Added Files:
-----------
pgsql/contrib/pg_stat_statements:
Makefile (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_stat_statements/Makefile?rev=1.1&content-type=text/x-cvsweb-markup)
pg_stat_statements.c (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_stat_statements/pg_stat_statements.c?rev=1.1&content-type=text/x-cvsweb-markup)
pg_stat_statements.sql.in (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_stat_statements/pg_stat_statements.sql.in?rev=1.1&content-type=text/x-cvsweb-markup)
uninstall_pg_stat_statements.sql (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_stat_statements/uninstall_pg_stat_statements.sql?rev=1.1&content-type=text/x-cvsweb-markup)
pgsql/doc/src/sgml:
pgstatstatements.sgml (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/pgstatstatements.sgml?rev=1.1&content-type=text/x-cvsweb-markup)