Re: dired-x functionality default to ON for all interactive emacs sessions

[Richard Stallman]

dired-aux.el is an original part of dired which I split out so that
normal use of Dired would be smaller.

dired-x.el is completely different.  It is a collection of
miscellaneous extensions to Dired.  I thought Dired-x was interesting
enough to put into the Emacs distribution, but I did not think it was
useful enough to be worth either maintaining it or documenting it in
the Emacs manual.  Hence the way I treated it.