Deprecate old admin modules

Added notification messages for the deprecation of the old admin interface
modules. Also added notes into the documentation about their deprecation.

Documentation/Reference/MaxAdmin.md

@@ -1,5 +1,7 @@
 # MaxAdmin - Admin Interface
 
+**NOTE:** MaxAdmin is deprecated, use [MaxCtrl](./MaxCtrl.md) instead.
+
 # The Maxscale Administrative & Monitoring Client Application
 
  - [Overview](#overview)

Documentation/Release-Notes/MaxScale-2.3.1-Release-Notes.md

@@ -38,7 +38,7 @@ release. The functionality in `mmmon` has been largely obsoleted by the
 advancements in `mariadbmon`. The `ndbclustermon` is largely obsolete due to the
 fact that there are virtually no users who use it.
 
-### Deprecated options
+## Deprecated features
 
 The following configuration file options have been deprecated and will
 be removed in 2.4.
@@ -53,8 +53,19 @@ be removed in 2.4.
 
 ### MaxAdmin
 
-The commands `set pollsleep` and `set nbpolls` have been deprecated and
-will be removed in 2.4.
+MaxAdmin has been deprecated in favor of the REST API and MaxCtrl. It will be
+removed in a later release.
+
+In addition to this the commands `set pollsleep` and `set nbpolls` have been
+deprecated and will be removed already in 2.4.
+
+### MaxInfo
+
+The `maxinfo` router has been deprecated and will be removed in a later release.
+
+### Debugcli
+
+The `debugcli` module has been deprecated and will be removed in 2.4.
 
 ## New Features
 

server/modules/routing/cli/cli.cc

@@ -63,7 +63,7 @@ extern int execute_cmd(CLI_SESSION* cli);
  */
 extern "C" MXS_MODULE* MXS_CREATE_MODULE()
 {
-    MXS_NOTICE("Initialise CLI router module");
+    MXS_WARNING("THE 'cli' MODULE AND 'maxadmin' ARE DEPRECATED: Use 'maxctrl' instead");
 
     static MXS_ROUTER_OBJECT MyObject =
     {

server/modules/routing/debugcli/debugcli.cc

@@ -65,7 +65,7 @@ static CLI_INSTANCE* instances;
  */
 extern "C" MXS_MODULE* MXS_CREATE_MODULE()
 {
-    MXS_NOTICE("Initialise debug CLI router module.");
+    MXS_WARNING("THE 'debugcli' MODULE IS DEPRECATED");
     pthread_mutex_init(&instlock, NULL);
     instances = NULL;
 

server/modules/routing/maxinfo/maxinfo.cc

@@ -93,7 +93,7 @@ static INFO_INSTANCE* instances;
  */
 extern "C" MXS_MODULE* MXS_CREATE_MODULE()
 {
-    MXS_NOTICE("Initialise MaxInfo router module.");
+    MXS_WARNING("THE 'maxinfo' MODULE IS DEPRECATED");
     pthread_mutex_init(&instlock, NULL);
     instances = NULL;