[web/staticcontrollers] create a unique temporary file for concat handling
Predictable names means different processes can race against each other.
Let's avoid that and use mkstemp to get a real unique temporary file,
and atomically rename it when we're done.
Closes #3524182
#! /bin/sh -e
if [ -x "/etc/init.d/cubicweb-ctl" ]; then
invoke-rc.d cubicweb-ctl restart || true
fi
#DEBHELPER#
exit 0