Add client metadata and docs
diff --git a/metadata/service/client.yml b/metadata/service/client.yml
new file mode 100644
index 0000000..5c4810f
--- /dev/null
+++ b/metadata/service/client.yml
@@ -0,0 +1,8 @@
+applications:
+- gerrit
+classes:
+  - service.gerrit.support
+parameters:
+  gerrit:
+    client:
+      enabled: True