Added zendframework/zend-config-aggregator-modulemanager as suggestion

composer.json

@@ -28,7 +28,8 @@
         "zendframework/zend-servicemanager": "^2.7.7 || ^3.1.1"
     },
     "suggest": {
-        "zendframework/zend-config": "Allows loading configuration from XML, INI, YAML, and JSON files"
+        "zendframework/zend-config": "Allows loading configuration from XML, INI, YAML, and JSON files",
+        "zendframework/zend-config-aggregator-modulemanager": "Allows loading configuration from zend-mvc modules without ConfigProvider"
     },
     "autoload": {
         "psr-4": {

docs/book/config-providers.md

@@ -162,3 +162,29 @@ type based on file extension.
 Some config readers (in particular, YAML) may need additional dependencies;
 please refer to [the zend-config manual](https://docs.zendframework.com/zend-config/reader/)
 for more details.
+
+
+### ZendModuleProvider
+
+To provide configurations from old Modules which were created for `zendframework/zend-mvc` applications, you can use the `ZendModuleProvider` which is provided by the [zendframework/zend-config-aggregator-modulemanager](https://github.com/zendframework/zend-config-aggregator-modulemanager) extension.
+This provider would parse the module class for the `Module::getConfig` method aswell as for the `Module::getServiceConfig` (declared by `ServiceProviderInterface`).
+
+```bash
+$ composer require zendframework/zend-config-aggregator-modulemanager
+```
+
+Once installed, you may use as many `ZendModuleProvider` instances as you need:
+
+```php
+use Zend\ConfigAggregator\ConfigAggregator;
+use Zend\ConfigAggregatorModuleManager\ZendModuleProvider;
+use ACME;
+
+$aggregator = new ConfigAggregator([
+    new ZendModuleProvider(new ACME\Module()),
+]);
+```
+
+`ZendModuleProvider` accepts any object which represents the `zend-mvc`-Module. For more details, please refer
+to [the zend-config-aggregator-modulemanager manual](https://docs.zendframework.com/zend-config-aggregator-modulemanager/) 
+for more details.