The API guide on faults has a section on server actions
but just links to the API reference. There is also the
"Asynchronous faults" section at the bottom which refers
to the server actions API but does not go into details.
This fleshes that section on server actions out a bit more
and includes a walkthrough on the command line of a failed
resize due to NoValidHost. I chose this example since the
server status does not change to ERROR so there is no fault
to see in the server details when the resize action fails.
Change-Id: I95130eeeac1ef8f4676925fe6c0e2d386d88259c
a4966b8ee9