During the migration the automated script to update the copyright
headers accidentally got rid of some of the existing copyright lines.
Reinstate them.
This removes the magic allowing accessing configurable
variables directly from the config object. It is now required
that a specific configuration class is used (e.g. `config.foo`
must be replaced with `config.server.foo`).
Setting the value will help PostgreSQL free up memory by recycling
the connections in the connection pool.
Signed-off-by: Toni Spets <toni.spets@iki.fi>
