Stability improvements
- Change transaction queue limit and broadcast policy to improve performance during arbitrage spikes
- Fix overlay broadcast metric to only account for messages that were actually sent
- Prefetching performance improvements
- Subprocess shutdown fixes
- Improve HAS validation
- Fix legacy logging
- Surveying, add a command to transform the master graph into json for downstream systems
- bump asio to 1.18.1
- Fuzzer setup improvements
New features
None
Breaking changes
- Switch to llvm-8 and gcc-7 (focal updates) in our CI ; existing pull requests may have to be reformatted with clang-format-8