Signed-off-by: Miek Gieben <miek@miek.nl>

Mechanical change: make -f Makefile.doc
Signed-off-by: Miek Gieben <miek@miek.nl>

Add configuration flag to set if RecursionDesired should be set on health checkers in Forward-plugin (#3679)

* Make the RD-flag in health-checks in the Forward-plugin configurable

Introduces a new configuration flag; `health_check_non_recursive`. This
flag makes the health-checker do non-recursive requests when checking
the health of upstream servers.
Signed-off-by: Geir Haugom <ghagit@haugom.org>
Signed-off-by: Christian Tryti <ctryti@gmail.com>

* Changes after feedback from reviewer

* Better tests of health-checks with and without recursion
* Removed the health_check_non_recursive configuration in favor of
extending the existing health_check configuration. Now supports an
optional `no_rec` argument.
Signed-off-by: Christian Tryti <ctryti@gmail.com>

* Add new test that checks setup of health_check.
Signed-off-by: Christian Tryti <ctryti@gmail.com>

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

Signed-off-by: imba-tjd <imba-tjd@users.noreply.github.com>

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.29.8 to 1.29.14.
- [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/v1.29.8...v1.29.14)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/golang/protobuf](https://github.com/golang/protobuf) from 1.3.3 to 1.3.4.
- [Release notes](https://github.com/golang/protobuf/releases)
- [Commits](https://github.com/golang/protobuf/compare/v1.3.3...v1.3.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/Azure/go-autorest/autorest](https://github.com/Azure/go-autorest) from 0.9.6 to 0.10.0.
- [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/v0.9.6...autorest/v0.10.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [gopkg.in/DataDog/dd-trace-go.v1](https://github.com/DataDog/dd-trace-go) from 1.21.0 to 1.22.0.
- [Release notes](https://github.com/DataDog/dd-trace-go/releases)
- [Commits](https://github.com/DataDog/dd-trace-go/compare/v1.21.0...v1.22.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/caddyserver/caddy](https://github.com/caddyserver/caddy) from 1.0.4 to 1.0.5.
- [Release notes](https://github.com/caddyserver/caddy/releases)
- [Commits](https://github.com/caddyserver/caddy/compare/v1.0.4...v1.0.5)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Signed-off-by: Sylvain Rabot <sylvain@abstraction.fr>

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

* Modifies NODATA handling
Signed-off-by: ykhr53 <ykhr53@yokohei.com>

* fix some comments
Signed-off-by: ykhr53 <ykhr53@yokohei.com>

* fix test code to take care NODATA
Signed-off-by: ykhr53 <ykhr53@yokohei.com>

* add if statement to avoid nil pointer
Signed-off-by: ykhr53 <ykhr53@yokohei.com>

* Modifies NODATA handling
Signed-off-by: ykhr53 <ykhr53@yokohei.com>

* fix some comments
Signed-off-by: ykhr53 <ykhr53@yokohei.com>

* fix test code to take care NODATA
Signed-off-by: ykhr53 <ykhr53@yokohei.com>

* add if statement to avoid nil pointer
Signed-off-by: ykhr53 <ykhr53@yokohei.com>

Bumps [github.com/Azure/go-autorest/autorest](https://github.com/Azure/go-autorest) from 0.9.5 to 0.9.6.
- [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/v0.9.5...autorest/v0.9.6)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.29.3 to 1.29.8.
- [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/v1.29.3...v1.29.8)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

Automatically submitted.

Currently, when we access github.com with HTTP, it is redirected to HTTPS automatically. So this commit aims to replace http://github.com by https://github.com for security.
Signed-off-by: Kim Bao Long <longkb@vn.fujitsu.com>

Bumps [gopkg.in/DataDog/dd-trace-go.v1](https://github.com/DataDog/dd-trace-go) from 1.20.1 to 1.21.0.
- [Release notes](https://github.com/DataDog/dd-trace-go/releases)
- [Commits](https://github.com/DataDog/dd-trace-go/compare/v1.20.1...v1.21.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.28.13 to 1.29.3.
- [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/v1.28.13...v1.29.3)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [k8s.io/apimachinery](https://github.com/kubernetes/apimachinery) from 0.17.2 to 0.17.3.
- [Release notes](https://github.com/kubernetes/apimachinery/releases)
- [Commits](https://github.com/kubernetes/apimachinery/compare/v0.17.2...v0.17.3)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Signed-off-by: Andy Bursavich <abursavich@gmail.com>

Bumps [github.com/Azure/go-autorest/autorest](https://github.com/Azure/go-autorest) from 0.9.4 to 0.9.5.
- [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/v0.9.4...autorest/v0.9.5)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.28.9 to 1.28.13.
- [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/v1.28.9...v1.28.13)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.4.0 to 1.4.1.
- [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/v1.4.0...v1.4.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

* plugin/pkg/up: make default intervals shorter

I think 15 min is too high, make this lower to react faster.
Signed-off-by: Miek Gieben <miek@miek.nl>

* Update README
Signed-off-by: Miek Gieben <miek@miek.nl>

Move exponential backoff initialization to Start()
Signed-off-by: RickyRajinder <singh.sangh@gmail.com>

Move comment

Increase max interval and update README

Remove trailing whitespace

Change Start() param name back to interval