Allow SSL from the application to the database

Allow an option to append options to the end of the jdbc url for things like an SSL connection to a postgresql database.

jdbc:postgresql://bitbucket.example.com:5432/<database name>?sslmode=verify-full&sslrootcert=<non-default-location>

https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_PostgreSQL.html#PostgreSQL.Concepts.General.SSL

https://www.postgresql.org/docs/9.4/static/libpq-ssl.html

There is a pull request for this feature #161