pgsql: Remove references to pgfoundry as recommended hosting platform

Remove references to pgfoundry as recommended hosting platform

pgfoundry is deprectaed and no longer accepting new projects,
so we really shouldn't be directing people there.

Branch
------
REL9_1_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/20060705282a9de7ca61ccdceb3b575ba64f8c13

Modified Files
--------------
doc/src/sgml/external-projects.sgml | 13 -------------
1 files changed, 0 insertions(+), 13 deletions(-)