Merge pull request #16064 from pachyderm/master

Add link to Pachyderm PFS volume driver plugin in plugins.md

docs/extend/plugins.md

@@ -55,6 +55,10 @@ The following plugins exist:
   a plugin that provides credentials and secret management using Keywhiz as
   a central repository.
 
+* The [Pachyderm PFS plugin](https://github.com/pachyderm/pachyderm/tree/master/src/cmd/pfs-volume-driver)
+  is a volume plugin written in Go that provides functionality to mount Pachyderm File System (PFS)
+  repositories at specific commits as volumes within Docker containers.
+
 * The [REX-Ray plugin](https://github.com/emccode/rexraycli) is a volume plugin
   which is written in Go and provides advanced storage functionality for many
   platforms including EC2, OpenStack, XtremIO, and ScaleIO.