[etwist] Fix an empty request content after a Twisted processing (closes #3546795).
The content of a POST request could be empty when the Twisted server is used.
#! /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