Connect to bees by IP instead of host names

[abguy]

Sometimes hostnames are not resolved.

[txssseal]

why would you not want the option to connect to both?

[FliesLikeABrick]

If this change is to be adopted, I think it should be accompanied by a command line option which enables "ssh by IP address". Because:

• With EC2 supporting IPv4 and IPv6 now, forcing IPv4 would be a bad practice and a regression from the more-expected behavior of SSHing by name
• This may change behavior for organizations that have instance names configured a certain way, an option would prevent a change to default behavior

The option would probably allow for selection between "SSH by" name, IPv4 address, IPv6 address.

[abguy]

I think that SSH by instance name is a bad idea. AWS allows to reconfigure internal VPC DNS through Route53. It is better to use IP addresses.

PS.
Too many things were changed since 2015. Let's just close this PR.