add host key
Usage
stack add host key {host} [key=string]
Description
Add a public key for a host. One use of this public key is to
authenticate messages sent from remote services.
Arguments
[host]
Host name of machine
Parameters
{key=string}
A public key. This can be the actual key or it can be a path name to a file that contains a public key (e.g., /tmp/public.key).