mount_server: restore automount notification.

Fix #14149.

src/servers/mount/AutoMounter.cpp

@@ -185,8 +185,7 @@ MountVisitor::Visit(BPartition* partition, int32 level)
 	if (!fInitialRescan) {
 		// Ask the user about mount flags if this is not the
 		// initial scan.
-		// TODO!
-		//if (!_SuggestMountFlags(partition, &mountFlags))
+		if (!AutoMounter::_SuggestMountFlags(partition, &mountFlags))
 			return false;
 	} else {
 		BString mountFlagsKey(path.Path());

src/servers/mount/AutoMounter.h

@@ -61,6 +61,8 @@ private:
 	static	bool				_SuggestMountFlags(const BPartition* partition,
 									uint32* _flags);
 
+		friend class MountVisitor;
+
 private:
 			mount_mode			fNormalMode;
 			mount_mode			fRemovableMode;