monitor: Fix directory symlink deletion handling

When a symlink to a direcotry is deleted inotify cannot tell it from a
regular file rendering all its children orphans.
This sometimes leads to an unexpected effect - they may appear later in
a newly created directory when it gets an id used by the deleted symlink.

monitor_inotify.c

@@ -366,7 +366,16 @@ inotify_thread(void *arg)
 					if ( event->mask & IN_ISDIR )
 						monitor_remove_directory(pollfds[0].fd, path_buf);
 					else
+					{
 						monitor_remove_file(path_buf);
+						/*
+						 * When a symlink to a directory is deleted
+						 * we cannot tell it from a regular file deletion
+						 * to prevent its children from becoming orphans
+						 * we delete the whole tree when it exists
+						 */
+						monitor_remove_tree(path_buf);
+					}
 				}
 				free(esc_name);
 			}