[tests] Port unittest_cwctl to py3k On python 2, sys.stdout takes bytes-like objects whereas python 3's takes unicode-like objects and handles the encoding on its own.

version=3
opts=uversionmangle=s/(rc|a|b|c)/~$1/ \
http://pypi.debian.net/cubicweb/cubicweb-(.+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))