Support cloud-based FluentD deployment

[arcivanov]

This means supporting:

1. Server host resolving to multiple IPs.
2. Refreshing server host IPs at A/AAAA/CNAME record TTL expiration.
3. Supporting fail-over to the next host available
4. Supporting round-robin load balancing

[yangmillstheory]

Is this related to #141?

[arcivanov]

very much so.