docs: use https for fluentd.org links (#653)

Replace http:// with https:// for all www.fluentd.org and fluentd.org
URLs across the docs. This is mostly the CNCF footer boilerplate that
appears on every page, plus a handful of in-body links. fluentd.org
serves all of these over https, so the plain-http links were needless.

Signed-off-by: Shizuo Fujita <fujita@clear-code.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: Watson1978

appendix/README.md

@@ -7,4 +7,4 @@ This section collects supplementary articles that do not fit into the other sect
 * [Update from v0.12 to v1](update-from-v0.12.md): how to update Fluentd to v1.0 from v0.12 or earlier.
 * [td-agent v2 vs v3 vs v4](td-agent-v2-vs-v3-vs-v4.md): differences between the `td-agent` series, kept for reference. Note that `td-agent` has already reached End of Life \(EOL\); use [`fluent-package`](../installation/install-fluent-package/) instead.
 
-If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
+If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](https://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.

appendix/td-agent-v2-vs-v3-vs-v4.md

@@ -59,5 +59,5 @@ This is for v0.12 and old distribution users. We don't recommend this version fo
 * [macOS](../installation/install-by-dmg-td-agent-v4.md)
 * [RubyGems](../installation/install-by-gem.md)
 
-If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under [the Apache License 2.0.](https://www.apache.org/licenses/LICENSE-2.0)
+If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](https://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under [the Apache License 2.0.](https://www.apache.org/licenses/LICENSE-2.0)
 

appendix/update-from-v0.12.md

@@ -85,5 +85,5 @@ Fluentd v1 changes buffer mechanism for flexibility. The new buffer consists of
 
 Log forwarding from v0.12 to v1.0 is no problem but log forwarding from v1.0 to v0.12 has a problem due to timestamp change. See [`in_forward`'s FAQ](https://fluentd.gitbook.io/manual/v/0.12/input/forward#i-got-messagepack-unknownexttypeerror-error-why)
 
-If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
+If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](https://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
 

buffer/README.md

@@ -216,5 +216,5 @@ This sometimes causes a problem when the output destination has a payload size l
 * [`buf_memory`](memory.md)
 * [`buf_file`](file.md)
 
-If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
+If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](https://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
 

buffer/file.md

@@ -171,5 +171,5 @@ If such a character was included in the path, it might be trouble (ignored) afte
 As a workaround, override `path` parameter in `<buffer>` section which does not contain such a character.
 {% endhint %}
 
-If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
+If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](https://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
 

buffer/file_single.md

@@ -107,5 +107,5 @@ This limitation will be removed by adding the metadata header in the file in the
 Caution: `file_single` buffer implementation depends on the characteristics of the local file system. Don't use `file_single` buffer on remote file systems e.g. NFS, GlusterFS, HDFS and etc. We observed major data loss by using remote file system.
 {% endhint %}
 
-If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
+If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](https://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
 

buffer/memory.md

@@ -24,5 +24,5 @@ If you want to understand buffer behavior precisely, see [Buffer Section Configu
 </match>
 ```
 
-If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
+If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](https://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
 

configuration/buffer-section.md

@@ -604,4 +604,4 @@ With `exponential_backoff`, `retry_wait` interval will be calculated as below:
 * total retry time: `c + c*b^1 + (...) + c*b^(k-1) = c*(b^k - 1) / (b - 1)`
   * = `2^k - 1` by default
 
-If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
+If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](https://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.

configuration/config-file-yaml.md

@@ -616,4 +616,4 @@ The backslash `\` is interpreted as an escape character. You need `\` for settin
 str_param:   "foo\nbar" # \n is interpreted as actual LF character
 ```
 
-If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
+If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](https://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.

configuration/config-file.md

@@ -682,5 +682,5 @@ The backslash `\` is interpreted as an escape character. You need `\` for settin
 str_param   "foo\nbar" # \n is interpreted as actual LF character
 ```
 
-If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
+If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](https://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.