Code review comment for lp:~rogpeppe/juju-core/312-api-jobs

NOT LGTM. Int jobs aren't great, but they're better than baking bad
names into the API forever, I think.

https://codereview.appspot.com/9754043/diff/13001/state/machine.go
File state/machine.go (right):

https://codereview.appspot.com/9754043/diff/13001/state/machine.go#newcode38
state/machine.go:38:
// jobNames MUST NEVER BE CHANGED.

...or maybe we could just use ints, as designed originally, and not
lumber the API with guaranteed-inaccurate names. (JobServeAPI is not
sensible; it conflates jobs with tasks.)

https://codereview.appspot.com/9754043/