* Update gopsutil to v3
* Adds v2 field names in host-info response to allow eventual deprecation in favor of v3 field names
* Map v3 to v2 field names to keep host-info api compat
* copy gopsutil license into source
* save
* save
* save
* first round of the diagnose language pass
* capitalization
* first round of feedback
* fix bug in advise
* a few more nouns to verbs
* Segment out disk checks to disable on openbsd/arm
Also add a spot skipped helper.
* Expected results may be fewer than actual because of variable length tests like disk usage
* Move to os_common and build on windows