- `b' is now an official alias for `break'. It used to be an unofficial
alias, but this was broken by adding the `bt' alias for `trace'.
- `t' is now an official alias for `trace'. It used to be an unofficial
alias, but this was broken by adding the `thread' command.
- `registers' is now an alias for `show registers'. This is a hack to
break the unofficial `r' alias for `reset'. `r' really means
`registers' in some debuggers, so I sometimes type it accidentally and
am annoyed when it resets the system. A short command shouldn't have
such a large effect. Now at least `res' must be typed to disambiguate
`reset'.