webapp.py: expose the brand variable in the /config URL.
webapp.py: expose the brand variable in the /config URL.

E.g. helpful for searx-stats2

Signed-off-by: Markus Heiser <14dfd67dd72e7ac80c040b62bb932f1e121795cc@darmarit.de>

asciimoo/searx,dalf/searx,asciimoo/searx,dalf/searx,asciimoo/searx,asciimoo/searx,dalf/searx,dalf/searx