Links do no work when export pages as html in zip

In order to reproduce :

create a page called unu
create another page under unu called doi
edit the page unu and put [[unu.doi]]
export the page called unu using syntax :

http://yourserver/xwiki/bin/export/unu/WebHome?format=html&pages=xwiki:unu.%25

extract the zip archive and open the page called unu
try to access the link to page called doi you will see it points remote

Observation in 6.4.5 it the link point locally and can be accessed. Attached screens and zip archives resulted after export