Update bwauth setup.sh to use tor 0.2.8.9
Currently, the bwauth script uses tor 0.2.6, which is getting pretty old. There are performance and security improvements in 0.2.8, so we sould use that.
Currently, the bwauth script uses tor 0.2.6, which is getting pretty old. There are performance and security improvements in 0.2.8, so we sould use that.