title: how to set knex connection ssl options when using a connection string
body: <p>How can I set my connection's ssl property to true when I'm using a connection string to initialize knex?  Similarly how to set the debug to true?  I would normally pass in a connection object but in this case I have to use a connection string from environment variables.</p>
  
  <pre><code>var database = {
      client: 'pg',
      connection: connstr //normally I would pass in the object below
      //connection: {
      //    "host": config.get('database_host'),
      //    "user": config.get('database_user'),
      //    "password": config.get('database_password'),
      //    "database": config.get('database_name'),
      //    "debug": config.get('database_debug'),
      //    "ssl":config.get('database_ssl')
      //}
  };
  
  var knex = require('knex')(database);
  knex.connection.ssl = true;  // this doesn't seem to do anything
  </code></pre>