Add another detailed plugin example.

examples/chart.md

@@ -4,7 +4,7 @@
 [stable chart]: https://github.com/helm/charts/tree/master/stable
 [Helm charts]: https://github.com/helm/charts
 [_minecraft_]: https://github.com/helm/charts/tree/master/stable/minecraft
-[plugin]: ../docs/plugins.md
+[plugin]: ../docs/plugins
 
 [Helm charts] aren't natively read by kustomize, but
 kustomize has a [plugin] system that allows one to

examples/secretGeneratorPlugin.md

@@ -126,7 +126,7 @@ them, etc.
 ## Secret values from anywhere
 
 A general alternative is to enshrine secret
-value generation in a [plugin](../docs/plugins.md).
+value generation in a [plugin](../docs/plugins).
 
 The values can then come in via, say, an
 authenticated and authorized RPC to a password

examples/validationTransformer/README.md

@@ -2,7 +2,7 @@
 
 [base]: ../../docs/glossary.md#base
 [kubeval]: https://github.com/instrumenta/kubeval
-[plugin]: ../../docs/plugins.md
+[plugin]: ../../docs/plugins
 
 kustomize doesn't validate either its input or
 output beyond the validation provided by the