* news: update for v2.0.0
* build*: use --always with git describe
* vendor: switch to coreos/vcontext
* config/validate: add tests for duplicate checking
* build: export GOFLAGS so they get used
* config/validate: add test for validation
* config/validate: check for unused keys
* internal/util/docs: update to use new validation
* internal: update to use new validation code
* config/validate: replace old validation with vcontext
* config/v3*: update to use new validation functions
* vendor: add vcontext
* internal: create dev aliases in /run/ignition/ instead of /
* Update hostname example
* tests/*: rename bb tests
* release-checklist: split out 0.x and 2.x+ bits
OBS-URL: https://build.opensuse.org/package/show/devel:kubic:ignition/ignition?expand=0&rev=18