* Replace RecordConfig.Name and .NameFQDN with getters and setters.
* Replace RecordConfig.Target with getters and setters.
* Eliminate the CombinedTarget concept.
* Add RecordConfig.PopulateFromString to reduce code in all providers.
* encode and decode name.com txt records (#315)
* Replace fmt.Errorf with errors.Errorf
* 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