NSM: use server-control instead of server_control

Signed-off-by: falkTX <falktx@falktx.com>

source/backend/CarlaStandaloneNSM.cpp

@@ -230,7 +230,7 @@ protected:
 
             fHasBroadcast     = std::strstr(features, ":broadcast:")      != nullptr;
             fHasOptionalGui   = std::strstr(features, ":optional-gui:")   != nullptr;
-            fHasServerControl = std::strstr(features, ":server_control:") != nullptr;
+            fHasServerControl = std::strstr(features, ":server-control:") != nullptr;
 
             // UI starts hidden
             if (fHasOptionalGui)

source/backend/plugin/CarlaPluginJack.cpp

@@ -215,8 +215,8 @@ protected:
             fProject.appName = &argv[0]->s;
             fHasOptionalGui  = std::strstr(&argv[1]->s, ":optional-gui:") != nullptr;
 
-            static const char* const featuresG = ":server_control:optional-gui:";
-            static const char* const featuresN = ":server_control:";
+            static const char* const featuresG = ":server-control:optional-gui:";
+            static const char* const featuresN = ":server-control:";
 
             static const char* const method  = "/nsm/server/announce";
             static const char* const message = "Howdy, what took you so long?";