pgsql: Add URL for: * SMP scalability improvements >

Log Message:
-----------
Add URL for:

* SMP scalability improvements

http://archives.postgresql.org/pgsql-hackers/2007-09/msg00206.php

Modified Files:
--------------
pgsql/doc:
TODO (r1.2375 -> r1.2376)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/TODO?r1=1.2375&r2=1.2376)
pgsql/doc/src/FAQ:
TODO.html (r1.883 -> r1.884)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html?r1=1.883&r2=1.884)