version=3
opts=dversionmangle=s/\+(debian|dfsg|ds|deb)\d*$//,uversionmangle=s/(\d)[_\.\-\+]?((RC|rc|pre|dev|BETA|beta|alpha|b|a)[\-\.]?\d*)$/$1~$2/ \
ftp://xmlsoft.org/libxml2/libxml2-(\d.*)\.(?:tgz|tbz2|txz|tar\.(?:gz|bz2|xz))