Tor 0.3.3.5-rc 修复了较早版本 Tor 中的各种错误，包括可能影响可靠性或正确性的错误。这是 0.3.3 系列中的第一个候选版本。
Major bugfixes (security, protover, voting):
Revise Rust implementation of protover to use a more memory- efficient voting algorithm and corresponding data structures, thus avoiding a potential memory-based DoS attack where specially crafted protocol strings would expand to fill available memory. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
Major bugfixes (performance, load balancing):
Directory authorities no longer vote in favor of the Guard flag for relays without directory support. Starting in Tor 0.3.0.1-alpha, clients have been avoiding using such relays in the Guard position, leading to increasingly broken load balancing for the 5%-or-so of Guards that don't advertise directory support. Fixes bug 22310; bugfix on 0.3.0.6.
Minor feature (continuous integration):
Update the Travis CI configuration to use the stable Rust channel, now that we have decided to require that. Closes ticket 25714.
Minor features (config options):
Change the way the default value for MaxMemInQueues is calculated. We now use 40% of the hardware RAM if the system has 8 GB RAM or more. Otherwise we use the former value of 75%. Closes ticket 24782.