A new SSHDialTimeout field is added to the ClusterNetworkingConfiguration
to allow cluster admins to override the default dial timeout of 30s.
The dial timeout is made available in /webapi/ping, stored in the tsh
profile, and cached on disk like other similar cluster settings so
that tsh ssh can consume the relevant information without requiring
an additional round trip to the cluster. At the moment, there is no
support for an unlimited dial timeout, as that would cause
complexity with backwards compatibility.
rosstimothy
741b54c2b4