redfishpower: output extra error info

[chu11]

Problem: redfisherpower outputs a very generic "node: error" message for all message errors encountered when trying to do a power operation. This isn't that useful.

Check for several error codes specific to "network" or "http" errors to differentiate them from "error", which is now a catch all for every other potential error.

[chu11]

re-pushed PR, it dawned on me there must be a way to internally get the response code from an http error. So we can get more detailed info now, which can make debugging a lot easier.

redfishpower> stat
phetchy33: unauthorized
redfishpower> auth SECRETSTUFF
redfishpower> stat
phetchy33: on
redfishpower> setstatpath redfish/v1/Systems/foof
redfishpower> stat
phetchy33: not found

[garlick]

Nice improvement!

Just to be sure we're on the same page, this helps users if they run with pm -T correct? And will set the stage for a future error expect if we go that way?

[chu11]

Just to be sure we're on the same page, this helps users if they run with pm -T correct? And will set the stage for a future error expect if we go that way?

yup, right now it's for -T so we have a better clue on what the problem is (URL could be wrong, authentication not setup, etc.).