[O] Function for html-preamble and html-postamble in org-publish

[Bill Jackson]

In version 7.7, a function provided to org-publish via :html-preamble or 
:html-postamble no longer accepts a property list of export options.  I 
do not know if this change is a bug, or if it is deliberate.

I pass functions to :html-preamble and :html-postamble to integrate 
generated HTML pages into a web site.  In previous versions of org-mode, 
such functions took a single argument as documented in 
org-export-html-premable: "The function takes the property list of 
export options as its only argument."  In version 7.7 this appears to 
have changed in org-html.el, org-export-as-html, lines 1,340 and 1,791 
(they no longer pass opt-plist), without any change to documentation.  
Further changes to this code have been made in the git repository.

I was able to restore the previous behavior simply by editing 
org-html.el to again pass opt-plist on the two lines, but am interested 
in what the future direction is for customizing the HTML output for 
org-publish.  Was this change unintentional, a deliberate minor change, 
or is org-publish or org-html undergoing significant re-design?  If this 
was deliberate, is there an alternate method for customization functions 
to access the property list?

Thanks for any insight,
Bill