[imp] Special characters in IMAP folder names

[Chris Shaffer]

I've discovered that having an ampersand in an IMAP folder name prevents 
users from replying to messages within that folder.  For example, a folder 
named:
  Games.Axis & Allies
won't work, but:
  Games.AxisAllies
or:
  Games.Axis and Allies
both work.  Would it be possible to prevent users from using ampersands in 
folder names? (when creating or renaming folders using IMP and not some 
other IMAP client, of course)

-- 
Chris Shaffer
cat-imp @ gesserit.net