Thread: pgsql: Add URL for: * Allow accurate statistics to be collected on

Log Message:
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Add URL for:

* Allow accurate statistics to be collected on indexes with more than
  one column or expression indexes, perhaps using per-index statistics
>   http://archives.postgresql.org/pgsql-hackers/2007-03/msg01131.php

Modified Files:
--------------
    pgsql/doc:
        TODO (r1.2122 -> r1.2123)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.2122&r2=1.2123)
    pgsql/doc/src/FAQ:
        TODO.html (r1.623 -> r1.624)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html.diff?r1=1.623&r2=1.624)