pt-slave-restart shouldn't exit on unknown error text
pt-slave-restart is designed to quit if --error-text is given but the error message doesn't match that. I run it as a daemon for several known types of errors (deadlocks, lock wait timeouts) and occasionally I get some other problem. I don't want it to quit and have to be restarted. It should just not do anything if it doesn't know what to do. Otherwise when an occasional problem happens, and I correct it manually, now I have to go restart the daemon manually instead of it picking up from there and fixing deadlock/timeout problems.