* feat(aws): support multiple hosted zones and automatic lookup

* chore: run gofmt with the simplified command

* fix(aws): add missing method from google provider

* fix: remove superflous parameter from google provider

* feat: make domain configurable via flag

* fix(aws): remove unused constant

* fix(aws): don't log actions that were filtered out

* feat(aws): detect best possible zone to put dns entries in

* fix(aws): log error instead of failing if a change batch fails

* chore: update changelog with support for multiple zones

* feat(aws): support for creating DNS records with ALIAS type

* fix(aws): increase code coverage by listing ALIAS records

* chore: update changelog with support for ALIAS records

* ref(aws): generalize naming of ELB to load balancer

* ref(google): remove superflous check for non-existing record

* fix(aws): return the correctly typed alias record

* feat(plan): allow plans to be parameterized via policies

* fix(controller): set a policy in the controller tests

* chore: allow go tip to fail

* chore: update changelog to include policies

* fix(plan): store a pointer to changes

* fix(controller): don't get address of a pointer

* kickoff txt registry

* fix inmemory dns provider to include recordtype info for validation

* Merge master

* fix ununsed variable in inmemory provider

* add tests for records

* add test for no prefix name formatter

* implement apply changes with tests

* add flag to enable txt registry

* add txt registry to main

* improve sort testing

* filter out non-owned records

* NewEndpoint(...) requires record type

* use newendpoint in aws_test, fix tests

* change suitable type implementation

* fix the test for compatibility component

* change inmemory provider to include recordtype and use suitable type

* fix comments, CNAME should target hostname

* name mapper do not use pointer on struct

* txt prefix - just concatenate, remove spew, fix txt record label

* allow TXT records as result from dns provider

* add changelog

* fix tests

* TXT records need to be enclosed in double quotes

* inherit labels from dns provider records

* do not change import statements, rollback autoformatter changes

* add comment for the public method

* define registry interface

* init in-memory registry

* remove ununsed variable, added comments

* add inmemory registry tests

* introduce DNSRecord struct

* use noop registry

* remove zone from registry fields

* replace provider with registry in controller

* move noop registry interface check to test

* remove ownerid from noop registry

* fix: remove dangling empty line

* return provider records directly with noop

* adjust according to pr review

* fix noop tests

* feat: expose basic go metrics via prometheus

* chore: vendor dependencies

* feat(metrics): combine healthz and metrics into single endpoint

* ref(metrics): rename metrics port to address

* docs(metrics): update changelog to include metrics feature

* ref(metrics): consistently rename port to address

improve quality of test code

* revert changes, start a new

* remove sanitize

* fix tests for source pkg

* fix aws_tests

* add testutils to compare changes, inmemory provider allow to inspect changes

* use map instead of plan.Changes

* 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

* add labels to endpoints

* reset to first commit fix label key

* compare using sameendpoint, add map initializer to newendpoint

* fix(endpoint): drop superflous comment indicators

* inject callbacks

* use initializer for inmemory_test to have the callbacks defined

* use pointer to endpoint via NewEndpoint initializer

* return nil if record does not exist in plan

* add test for NewEndpoint

* adjust documentation as per latest discussion regarding registry/storage

* rename group-id -> owner-id

* docs: add a CHANGELOG.md

* fix: add date to changelog

* Update README.md

* Update README.md

* Update README.md

* Update README.md

* Update faq.md

* Update README.md

* Update README.md

* Update README.md

* Update README.md

* docs: minor changes to the readme and faq

* create internal testutils package

* add boilerplate header to testutils/endpoint.go