[web] allow /data/ url again (closes #2464798)
This feature was broken by 65fecbeb9c3a (which fixed another one itself).
#! /bin/sh -e#if [ "$1" = configure ]; then if which install-docs >/dev/null 2>&1; then install-docs -i /usr/share/doc-base/cubicweb-doc fifi#DEBHELPER#exit 0