Multiple Hosts, Failover and Load Balancing

[dayvejones]

Hello! It would be great to have a feature like this:

let hosts = vec!["postgres://postgres:password@server1/test".to_string(), "postgres://postgres:password@server2/test".to_string()];

let pool = PgPoolOptions::new()
.max_connections(50)
.load_balance_hosts(true)
.connect(hosts).await?;

Good example: https://www.npgsql.org/doc/failover-and-load-balancing.html?tabs=7

Sorry, if this already exists.. Thanks!