buffer: don't auto-refresh non file buffers
buffer: don't auto-refresh non file buffers

This causes annoyances with some buffers such as *Buffer
List*, *docker*, etc. However I want to reload dired and that was the
initial reason for this change. Here I just set `auto-revert-mode` for
the `dired-mode` explicitly instead.

terlar/emacs.d,terlar/emacs.d,terlar/emacs.d,terlar/emacs.d