version=3
opts=\
dversionmangle=s/\+(debian|dfsg|ds|deb)\d*$//,\
uversionmangle=s/(\d)[_\.\-\+]?((RC|rc|pre|dev|beta|alpha)\d*)$/$1~$2/;s/RC/rc/ \
http://download.osgeo.org/geotiff/libgeotiff/ \
(?:.*?/)?(?:rel|v|libgeotiff)?[\-\_]?(\d\S+)\.(?:tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))