Add comments.

eekboard/eekboard-context.c

@@ -381,6 +381,7 @@ eekboard_context_new (GDBusConnection *connection,
             return NULL;
         }
 
+        /* the vanished callback is called when the server is disconnected */
         g_bus_watch_name_on_connection (connection,
                                         name_owner,
                                         G_BUS_NAME_WATCHER_FLAGS_NONE,

eekboard/eekboard-eekboard.c

@@ -155,6 +155,7 @@ eekboard_eekboard_new (GDBusConnection *connection,
             return NULL;
         }
 
+        /* the vanished callback is called when the server is disconnected */
         g_bus_watch_name_on_connection (connection,
                                         name_owner,
                                         G_BUS_NAME_WATCHER_FLAGS_NONE,

src/server-main.c

@@ -84,6 +84,7 @@ main (int argc, char **argv)
 
     g_log_set_always_fatal (G_LOG_LEVEL_CRITICAL);
 
+    /* preload Eek* types for EekKeyboard deserialization */
     g_type_class_ref (EEK_TYPE_KEYBOARD);
     g_type_class_ref (EEK_TYPE_SECTION);
     g_type_class_ref (EEK_TYPE_KEY);

src/server-server.c

@@ -287,6 +287,8 @@ handle_method_call (GDBusConnection       *connection,
         g_hash_table_insert (server->context_hash,
                              object_path,
                              context);
+
+        /* the vanished callback is called when clients are disconnected */
         g_bus_watch_name_on_connection (server->connection,
                                         sender,
                                         G_BUS_NAME_WATCHER_FLAGS_NONE,