* Switched to v2 go.mod
Also set GO111MODULE=on in build stuff to always use Go modules
even when in GOPATH.
* Ensure go.mod, go.sum, and vendor are up to date
* Attempt to fix Azure pipelines
* Add set -e to properly fail on exit (it didn't seem to be
propagating properly before).
* Set workingDirectory for GoFmt and GoGen (this might be why it
fails unlike compile and unitests).
* Another attempt to fix Azure Pipelines
* Use the Go env template for all go-related jobs.
* Completely fixed Azure Pipelines
* Added a display name to GoFmt for consistency.
* Fixed diffs for GoFmt and GoGen.
* Show git status for checks.
* Drop GOPATH for tests
TODO: Do the same for integration tests.
* Drop GOPATH for integration tests
* Show more diffs
* Regenerate provider support matrix
This wasn't done in #590...
* Added Vultr provider
* Fixed tests
* Fixed CI build validation
* Add unsupported features
* Added #rtype_variations tags according to stackexchange.github.io/dnscontrol/adding-new-rtypes
* Add title (for compatibility with #223)
* Removed extra rtype_variations
