Allow a different db host in production
Allow a different db host in production

This sets us up for using a DB on RDS.

tobias/clojars-web,clojars/clojars-web,clojars/clojars-web,clojars/clojars-web,tobias/clojars-web,tobias/clojars-web,ato/clojars-web,ato/clojars-web