proposal: obsolete-var-funcs.el or compatibility-var-funcs.el

[Uwe Brauer <oub@mat.ucm.es>]

Hi 

The latest master has caused me some headaches, because according to the
NEWS file a lot of obsolete variables and functions have been removed.

In some cases these definitions are rather simple, like 


(define-obsolete-function-alias 'set-face-underline-p
                                'set-face-underline "24.3")

(defcustom gnus-local-domain nil
  "Local domain name without a host name.
The DOMAINNAME environment variable is used instead if it is defined.
If the function `system-name' returns the full Internet name, there is
no need to set this variable."
  :group 'gnus-message
  :type '(choice (const :tag "default" nil)
		 string))
(make-obsolete-variable 'gnus-local-domain nil "24.1")

So could such simple definitions just moved to a file 

obsolete-var-funcs.el or compatibility-var-funcs.el

Instead of being deleted.

That would help users who for one or the other reason still rely on old
code, can try to survive for a bit longer.

Regards

Uwe Brauer 


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