reqdiff: fix stupid regexp
reqdiff: fix stupid regexp

Among other things, this allows parsing of packages with dashes in name. Duh.

openstack-packages/rdopkg,Akasurde/rdopkg,ktdreyer/rdopkg,redhat-openstack/rdopkg,openstack-packages/rdopkg,hguemar/rdopkg,djipko/rdopkg,djipko/rdopkg,ktdreyer/rdopkg,redhat-openstack/rdopkg,hguemar/rdopkg,Akasurde/rdopkg