Upgrade tor on Snowflake bridge for TROVE-2020-002
These releases fix a couple of denial-of-service vulnerabilities. Everybody running an older version should upgrade as packages become available.
Upgrading tor may require an OS upgrade from Debian stretch (oldstable) to buster (stable), and/or a switch to the torproject.org package repository. Currently the bridge is on stretch, whose available version is 0.2.9.16-1.