pgsql: Add URL to: * SMP scalability improvements >

Log Message:
-----------
Add URL to:

* SMP scalability improvements

http://archives.postgresql.org/pgsql-hackers/2008-03/msg00361.php

Modified Files:
--------------
pgsql/doc:
TODO (r1.2374 -> r1.2375)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/TODO?r1=1.2374&r2=1.2375)
pgsql/doc/src/FAQ:
TODO.html (r1.882 -> r1.883)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html?r1=1.882&r2=1.883)