check for python >= 2.7
check for python >= 2.7

a29fca70f7ccc75964bcfffb8c8ab1617fcf2bba requires subprocess.check_output
which was added with Python 2.7

feld/Varnish-Cache,feld/Varnish-Cache,gquintard/Varnish-Cache,gquintard/Varnish-Cache,feld/Varnish-Cache,gquintard/Varnish-Cache,gquintard/Varnish-Cache,feld/Varnish-Cache,feld/Varnish-Cache