Re-level non-docs content to top of repo and rename content→docs

docs/references/http-websocket-apis/admin-api-methods/server-control-methods/index.md

@@ -0,0 +1,12 @@
+---
+html: server-control-methods.html
+parent: admin-api-methods.html
+metadata:
+  indexPage: true
+---
+# Server Control Methods
+
+Use these methods to manage the rippled server.
+
+
+{% child-pages /%}