iswitchb-use-virtual-buffers and recentf.

[Matt Hodges]

In GNU Emacs 21.3.50.8 (alphaev6-unknown-linux-gnu, X toolkit, Xaw3d scroll 
bars)
 of 2004-05-12 on tcdec3
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

iswitchb-use-virtual-buffers toggles recentf-mode to on with its
default value of nil, via (recentf-mode nil). I.e., with emacs -Q:

    (progn
      (iswitchb-mode)
      recentf-mode) => t

I noticed this after being prompted for a password on startup, because
I had recently edited a remote file using tramp, despite having never
knowingly enabled recentf-mode.

Maybe this feature should just test the value of recentf-mode, and
offer these virtual buffers if it is enabled.

Thanks,

Matt