confirm_actions
  1	Confirm marking groups
  2	Confirm printing
  4	Confirm posts, followups, replies and supersedes
  8	Confirm following a news: URL
  16	Confirm quitting

emphasized_text_mask
  1	Scan message
  2	Scan quoted text
  4	Scan signature
  8	Scan headers

use_mime
  1	Decode when viewing, encode when sending
  2	Decode when saving
  4	Encode local copy
  8	Decode when piping
