how to support Load balance and failover

[mhlywxl]

how to support Load balance and failover

[vahid-sohrabloo]

for now, this libs doesn't support load balancer.
I'm planning to add this feature. but it's not easy. I don't want to add a simple round-robin. It needs to support checking the replication delay and other parameters.
But it supports failover. it would be best if you used multi-host( and port if its not default)
for example

host=host1 host=host3 host=host3 ...