export of emphasized link

[Michael Brand <michael.brand@alumni.ethz.ch>]

Hi all,

An org-mode line with an emphasized link like that one taken from current Worg:
----------------------------------------------------------------------
*Drop an email to [[mailto:bzg%20AT%20altern%20DOT%20org][Bastien]]* 
mentioning your username on repo.or.cz
----------------------------------------------------------------------
shows the bold face in the Emacs Org buffer like expected. But it does not 
convert the emphasis and still shows `*' when exported to some formats:
- HTML: not converted
- LaTeX: could not check because of a missing setup on my side,
                    from the source code I guess that it converts
- DocBook: not converted
- ...: don't know about other formats and what they should support

After removing org-bracket-link-regexp from org-html-expand and 
org-docbook-expand the HTML and DocBook exports _are_ converted and look 
similar to the highlighting in the Emacs Org buffer. But the doc string of 
both functions tell:
"If there are links in the string, don't modify these."
Why should links be modified in org-mode but not in HTML or DocBook?

If there will be any change I would also like this:
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--- a/lisp/org.el
+++ b/lisp/org.el
@@ -3285,6 +3285,7 @@ example *bold*, _underlined_ and /italic/.  This variable
  characters, the face to be used by font-lock for highlighting in Org-mode
  Emacs buffers, and the HTML tags to be used for this.
  For LaTeX export, see the variable `org-export-latex-emphasis-alist'.
+For DocBook export, see the variable `org-export-docbook-emphasis-alist'.
  Use customize to modify this, or restart Emacs after changing it."
    :group 'org-appearance
    :set 'org-set-emph-re
----------------------------------------------------------------------

And: wouldn't it be nice for maintenance to have only one function for some 
sets of functions like
- org-html-expand, org-docbook-expand and possibly more
- org-html-do-expand, org-docbook-do-expand and possibly more
- org-export-html-convert-emphasize, org-export-docbook-convert-emphasize and 
possibly more
- org-export-html-convert-sub-super, org-export-docbook-convert-sub-super and 
possibly more
- possibly more
because they have almost all code in common.

Michael