spip-contrib.net -> contrib.spip.net pour Francky 

find . -name '*' | grep '/lang/'  | xargs sed -i 's#http://www.spip-contrib.net/#http://contrib.spip.net#g'
find . -name '*.xml' | xargs sed -i 's#http://www.spip-contrib.net/#http://contrib.spip.net#g'