Combine MaxAdmin tutorials

Combined all maxadmin related tutorials into one document. This removes
the duplication of documentation found in all tutorials.

Documentation/Tutorials/Configuring-MaxAdmin.md

@@ -0,0 +1,21 @@
+# Configuring the MaxAdmin Administrative Interface
+
+To configure the service which is used by the `maxadmin` command to connect to
+MariaDB MaxScale, add the following service and listener sections to the
+configuration file.
+
+```
+[CLI]
+type=service
+router=cli
+
+[CLI-Listener]
+type=listener
+service=CLI
+protocol=maxscaled
+socket=default
+```
+
+This defines a UNIX domain socket which `maxadmin` will use to connect to
+MaxScale. MaxAdmin provides monitoring and administration functionality that can
+be used to inspect the state of MaxScale.