[MERGE] selftest enhancements: --exclude, --randomize, --list-only

[Andrew Bennetts]

Ian Clatworthy wrote:
> John Arbash Meinel wrote:
[...]
> >And it might be nicer if we support multiple -x options. Once JML's 
> >patch lands to provide a ListOption, it should be easy enough to add.
> >Then instead of using ',' we can have people do:
> >
> >-x one -x two -x three
> >
> Agreed. Aaron had some feedback re list options (see 
> https://bugs.launchpad.net/bzr/+bug/105366) that reviewers of JMLs patch 
> need to consider. I do like list options and I'd like us to support them 
> one way or another.

I think just supporting:

    -x one -x two -x three

for this and not commas or anything else would be ideal.  I'm happily ignorant
of the infrastructural issues involved in making this work :)

It wasn't clear to me if you were intending to do this, or to do this plus
support "-x one,two,three"?

-Andrew.