[Mailman-Developers] lowercase in mailman create function

[Stephen J. Turnbull]

Mark Sapiro writes:

 > Thanks for the report. I don't think it's necessary to open a bug. I'll
 > fix it without a bug in the tracker,

Up to you, but it is useful to people with lower versions to be able
to see that the bug has been reported, and what progress is being made,
in the tracker.

 > but I would like some feedback if
 > anyone has any opinion on the best place to do it, i.e., the Create()
 > method, Utils.list_exists(), both or somewhere else.

IMO, fix it in Utils.list_exists() and call that from the Create() method.