Log Message:
-----------
Update URLs to a couple of external projects
Modified Files:
--------------
pgsql/doc/src/sgml:
external-projects.sgml (r1.16 -> r1.17)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/external-projects.sgml?r1=1.16&r2=1.17)