Merge pull request ceph#60892 from zdover23/wip-doc-2024-11-30-glossary-dashboard-plugin

doc/glossary.rst: add "Dashboard Plugin"

Reviewed-by: Anthony D'Atri <[email protected]>

Author: zdover23

doc/glossary.rst

@@ -261,6 +261,14 @@
                 Another name for :term:`Dashboard`.
 
 	Dashboard Plugin
+                The dashboard plugin was a Mimic-era web application that
+                visualized information and statistics about the Ceph cluster
+                using a web server hosted by the :ref:`Ceph
+                Manager<ceph-manager-daemon>`.
+
+                See `the Mimic-era Dashboard Plugin documentation
+                <https://docs.ceph.com/en/mimic/mgr/dashboard/>`_.
+
         DC
                 **D**\ata **C**\enter.