[session] fix arguments default value and promote usage of security_enabled as session method. Closes #2481820
One should use session method rather than direct usage of the context manager
of the same name.
Fix default argument values for consistency with the context manager: when one
omit an argument, meaning is "keep the current value", not "disable security".
#! /bin/sh -e
if [ -x "/etc/init.d/cubicweb-ctl" ]; then
invoke-rc.d cubicweb-ctl restart || true
fi
#DEBHELPER#
exit 0