Bug 1288369 - Use TLS when connecting to RDS from Vagrant
Bug 1288369 - Use TLS when connecting to RDS from Vagrant

Previously if someone set `DATABASE_URL` in their Vagrant environment
to a remote RDS instance, TLS wouldn't have been used. Now, using TLS
depends not on the `IS_HEROKU` environment variable (which we should
stop using anyway, since it goes against the 12-factor methodology), but
the DB hostname itself.

The CA bundle path has been made relative, to allow it to work inside
Vagrant as well as on Heroku.

kapy2010/treeherder,kapy2010/treeherder,edmorley/treeherder,tojon/treeherder,tojonmz/treeherder,tojon/treeherder,edmorley/treeherder,KWierso/treeherder,tojon/treeherder,tojonmz/treeherder,edmorley/treeherder,kapy2010/treeherder,kapy2010/treeherder,edmorley/treeherder,KWierso/treeherder,tojonmz/treeherder,tojonmz/treeherder,tojonmz/treeherder,tojon/treeherder,KWierso/treeherder,tojonmz/treeherder,kapy2010/treeherder,KWierso/treeherder