change extlite connection handling: connection may not be shared among threads but it's fine to have multiple connections open in several threads (as demonstrated by unittest_extlite)

#! /bin/sh -e

if [ -x "/etc/init.d/cubicweb-ctl" ]; then
    invoke-rc.d cubicweb-ctl restart || true
fi
 
 
#DEBHELPER#
 
exit 0