[MERGE] Initial support for marking bugs as fixed using bzr

[Jonathan Lange]

On 4/13/07, Aaron Bentley <aaron.bentley at utoronto.ca> wrote:
> ListOption is IMHO unwelcome.  I've put a lot of effort into making sure
> our options play nicely with aliases.  Every option type we support
> allows us to override aliases.  Boolean options provide an inverse
> option.  Value options allow another value to be specified, which
> overrides the previous one.  RegistryOptions allow another value to be
> specified, which overrides the previous one.
>
> ListOption does not provide a way for us to override it, if set from an
> alias.  There is no way to clear the list partway through and start
> over, and Jonathan hasn't even discussed it.
>
> Until we've resolved this, I am against putting ListOption in.
>

I've followed Ian's suggestion and made it so that passing '-' as a
value to a list option will reset the list.

cheers,
jml