Add instructions for using GKE workload identity to allow ExternalDNS
to authenticate against Google Cloud DNS APIs. Add blog link to
README.
Signed-off-by: David Dooling <dooling@gmail.com>

The k8s external-dns project now uses the official Kubernetes projects
container registry at k8s.gcr.io. Update all references to use the new
registry.

when using `registry=txt` option, make sure to also use the `txt-prefix` and `txt-owner-id` options as well. If you try to create a `TXT` record in VinylDNS without a prefix, it will try to create a `TXT` record with the same name as your actual DNS record and fail (creating a stranded record `external-dns` cannot manage).

* Update apiVersions in docs

Update docs to reflect new apiVersions for ingresses and deployments.

* Add selector to apps/v1 deployments

The extensions/v1beta1 API is deprecated for Deployment and with 1.16 is
not served by default anymore. This breaks the examples on k8s 1.16.

See this blog post for details on the deprecations:

https://kubernetes.io/blog/2019/07/18/api-deprecations-in-1-16/

Seems like there was attempts to fix it but change didn't make it to master

* Add recent changes to the changelog
* Update version in docs
Signed-off-by: Nick Jüttner <nick@zalando.de>

serviceAccountName was transposed onto the non-RBAC example

* update RBAC rules in docs

* update docs with split between rbac and non

* make deployment use new sa

* docs: correctly reference service account in CRB

* docs: correctly reference service account in CRB in other docs

* Support for multiple domains within --domain-filter

The parameter accepts a comma separated list of domains with or without trailing dot. Example: --domain-filter="example.org, company.test.,staging.com". Closes #247 and #229

* Add boilerplate header

* Add documentation for methods and structs

* use StringsVar for the domain-filter flag

* go fmt

* Remove camel case from tests

* Revert changes in README.md

* Move DomainFilter to provider package

* Make a new slice and copy elements to it

* Update CHANGELOG.md

* docs: change minor spelling mistake

* adjust docs before the v0.3.0 release

* minor fixes

* docs: add missing dot

* docs: add missing dot

* docs: drop line

* docs: drop another line

* adjust documentation

* update main readme

* checkbox for releases, add --txt-owner-id flag in description

* docs: minor weird character fixes [ci skip]

Bug in question: https://github.com/kubernetes-incubator/external-dns/issues/154

This is fixed in 0.2.1

* feat(aws): support hostnames as endpoint targets

* docs: describe how to run ExternalDNS on AWS

* docs: update changelog with CNAME feature

* docs: update changelog to include AWS documentation

* fix(aws): test that updating records removes the old value

* feat(google): add CNAME support to Google provider

* fix(source): sanitize source and target hostnames

* docs: update changelog to include latest changes

* docs(aws): mention that ExternalDNS takes full ownership of a hosted zone

* fix(aws): switch route53 tests to use endpoint pointers

* docs: add TODO to remove record filtering once ownership is in place

* docs: elaborate the docs, add a faq section

* docs: fix a messed up command

* docs: update docs to reference v0.1 release

* docs(faq): fix stray whitespace

* docs: restructure docs for a leaner README

* docs: move first run section back to main readme

* docs: fix references to packages

* docs: fix reference to gke tutorial

* docs: fix missing source flag in examples

* docs: fix missing provider flag in examples

* docs: mention ingress support in main readme