version=3
http://download.gna.org/gregorio/releases/current/ \
(?:.*/|.*=|)gregorio[\-\._](\d\S*)\.(?:tar\.xz|txz|tar\.bz2|tbz2|tar\.gz|tgz)(?:/\S*)?
# Bart Martens <bartm@debian.org>  Wed, 29 May 2013 17:29:47 +0000
