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
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REL9_2_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/5f2fa7f5616fac9ca5570d033e2b66ed5c8da595

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