postgresql security and bug fix update

9.2.18-1 - update to 9.2.18 per release notes http://www.postgresql.org/docs/9.2/static/release-9-2-18.html http://www.postgresql.org/docs/9.2/static/release-9-2-17.html http://www.postgresql.org/docs/9.2/static/release-9-2-16.html 9.2.15-2 - fix postgresql-setup to work if postgres user is set t...