[Orgmode] Option to turning off the last line in HTML export postamble

[Wanrong Lin]

Hi,

For some of my org files, I don't want the following line to show up in 
my HTML export:

"HTML generated by org-mode 6.05b in emacs 22"

Is there an option to turn it off? I looked at the org source code and 
it seems the answer is no. Can a new option be added for it? Thanks a 
lot for considering this suggestion.

Wanrong