//! Start the Bref server.
//!
//! ## Usage
//!
//! ```sh
//! $ bref --help
//! Usage: bref [OPTIONS]
//!
//! Options:
//! -p, --port <PORT>
//! Port to listen to
//!
//! [env: PORT=]
//! [default: 8080]
//!
//! --db-path <DB_PATH>
//! Path to the database.
//!
//! By default, Bref uses the preferred XDG data directory.
//!
//! [env: DB_PATH=]
//!
//! -h, --help
//! Print help (see a summary with '-h')
//!
//! -V, --version
//! Print version
//! ```
use Result;
use Bref;
async