Signed-off-by: Dominic Yin <yindongchao@inspur.com>

* add expiration jitter
Signed-off-by: Miek Gieben <miek@miek.nl>

* sign: add expiration jitter

This PR adds a expiration jitter to spread out zone re-signing even
more. The max is 5 extra days added when creating the signer for a
specific zone.

Also make the duration* constants private to clean up the godoc for this
plugin.
Signed-off-by: Miek Gieben <miek@miek.nl>

Bumps [github.com/miekg/dns](https://github.com/miekg/dns) from 1.1.26 to 1.1.27.
- [Release notes](https://github.com/miekg/dns/releases)
- [Changelog](https://github.com/miekg/dns/blob/master/Makefile.release)
- [Commits](https://github.com/miekg/dns/compare/v1.1.26...v1.1.27)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.26.8 to 1.27.0.
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Changelog](https://github.com/aws/aws-sdk-go/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-go/compare/v1.26.8...v1.27.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Signed-off-by: zheng xie <xiez1989@gmail.com>

* Add test case for TXT lookup via CNAME
Signed-off-by: Jonathan Nagy <nagytech@users.noreply.github.com>

* Return HostType of explicit TXT records
Signed-off-by: Jonathan Nagy <nagytech@users.noreply.github.com>

* Adapt TXT method lookup to allow lookup via CNAME
Signed-off-by: Jonathan Nagy <nagytech@users.noreply.github.com>

* Implement lookup of TXT records via CNAME
Signed-off-by: Jonathan Nagy <nagytech@users.noreply.github.com>

Signed-off-by: zouyee <zounengren@cmss.chinamobile.com>

Signed-off-by: zouyee <zounyee1989@gmail.com>

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.26.7 to 1.26.8.
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Changelog](https://github.com/aws/aws-sdk-go/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-go/compare/v1.26.7...v1.26.8)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Went over all generated manual pages and fixed some markdown issues,
mostly escaping "_" to avoid underlining entire paragraphs.

Some textual fixes in route53 and other cloud DNS plugins.

Regenerated the markdown with mmark.
Signed-off-by: Miek Gieben <miek@miek.nl>

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.25.1 to 1.26.0.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.25.1...v1.26.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.26.2 to 1.26.7.
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Changelog](https://github.com/aws/aws-sdk-go/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-go/compare/v1.26.2...v1.26.7)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [google.golang.org/api](https://github.com/google/google-api-go-client) from 0.14.0 to 0.15.0.
- [Release notes](https://github.com/google/google-api-go-client/releases)
- [Changelog](https://github.com/googleapis/google-api-go-client/blob/master/CHANGES.md)
- [Commits](https://github.com/google/google-api-go-client/compare/v0.14.0...v0.15.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/miekg/dns](https://github.com/miekg/dns) from 1.1.25 to 1.1.26.
- [Release notes](https://github.com/miekg/dns/releases)
- [Changelog](https://github.com/miekg/dns/blob/master/Makefile.release)
- [Commits](https://github.com/miekg/dns/compare/v1.1.25...v1.1.26)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.2.1 to 1.3.0.
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/master/CHANGELOG.md)
- [Commits](https://github.com/prometheus/client_golang/compare/v1.2.1...v1.3.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Signed-off-by: ykhr53 <ykhr53@yokohei.com>

made these to the coredns.io repo as well, but this is canonical.
Signed-off-by: Miek Gieben <miek@miek.nl>

The Kubernetes DNS specification schema version was
updated to 1.1.0 in order to support IPv6
Signed-off-by: Antonio Ojea <antonio.ojea.garcia@gmail.com>

Signed-off-by: zouyee <zounengren@cmss.chinamobile.com>

Bumps [github.com/Azure/go-autorest/autorest/azure/auth](https://github.com/Azure/go-autorest) from 0.4.1 to 0.4.2.
- [Release notes](https://github.com/Azure/go-autorest/releases)
- [Changelog](https://github.com/Azure/go-autorest/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Azure/go-autorest/compare/autorest/azure/auth/v0.4.1...autorest/azure/auth/v0.4.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.25.48 to 1.26.2.
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Changelog](https://github.com/aws/aws-sdk-go/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-go/compare/v1.25.48...v1.26.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Signed-off-by: zouyee <zounengren@cmss.chinamobile.com>

Automatically submitted.

Loose the colon from the commands to release a new coredns version.
Signed-off-by: Miek Gieben <miek@miek.nl>

Signed-off-by: ykhr53 <yukihira.lab@gmail.com>

* Add release note for v1.6.6
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Update release note to cover review comments
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

For release tracking 3519
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>