Building of this binary is controlled with features, allowing downstream
users to build just the SQLite version and not be concerned with the
tokio-postgres dependency tree (which includes links to OpenSSL and
other details). The Postgres version is disabled by default.
This does not change the binary name for the SQLite build, just to avoid
confusion for people upgrading to the new version.
This is built to be more robust than the SQLite storage, and to
integrate with other applications. The idea is that for example a web
application might interact with the same DB to create and delete clients
as customers come and go.
