(lock_db): Log a message when a stale lock is removed.

src/server/lockdb.c

@@ -121,6 +121,8 @@ int lock_db(void)
 	if (remove(param.lockfile_name) < 0 && errno != ENOENT)
 	    restart_kom("Failed to remove stale lock symlink %s\n",
 			param.lockfile_name);
+	else
+	    kom_log("Stale lock file left by %s removed.\n", current_lock);
     }
     restart_kom("Unreachable code reached in lock_db.\n");
 }