[datafeed parser] fix retrieve_url to always return urllib2.urlopen compatible output as one should expect to be able to call geturl/getcode/info on the returned object whatever the url he gave. Related to #3682069

#! /bin/sh -e
 
case "$1" in
    remove)
	if [ -x "/etc/init.d/cubicweb-ctl" ]; then
	    invoke-rc.d cubicweb-ctl stop || true
	fi
    ;;
esac
 
#DEBHELPER#
 
exit 0