* Switch cmd/amtool to kingpin
* Touch-ups
* Implement long help
* Add missing short-form of --output
* Fix backwards compatibility for config file options
* Fix vendoring
* Review fixes
* Fix flag word order
This is similar to `promtool check-config` and allows one
to validate the alertmanager configuration (as a git presubmit for example).
`govendor fetch github.com/spf13/{cobra,pflag}` was needed to
have support for `Args`.
Calle Pettersson
Jose Donizetti
Julius Volz
Corentin Chary