• Fix issues with the ICMP probe introduced in v1.14.0 related to probing IPv6 hosts.
• Change the behavior of the ICMP prober if an hostname is provided for the replica; all resolved addresses are now health-checked in sequential order (as ICMP is used to check if an host is up or down, we need to check all IPs provided in the DNS response — unlike upper layer application-level TCP and HTTP checks where a single randomly-picked address is checked, as this is sufficient to deem a replica as healthy or dead).