Change Details

`build/test/functional/test_runner.py sendheaders-selfish-mining.py` and examine the logs at `/tmp/bitcoin_test_runner_xxx/sendheaders-selfish-mining_xxx/node0/regtest/debug.log`. Note that the tmp files get cleaned up if the test passes, so make it fail with `assert()` at the end of `sendheaders-selfish-mining.py` to see these logs.

With D1442 applied: `build/test/functional/test_runner.py sendheaders-selfish-mining.py` and examine the logs at `/tmp/bitcoin_test_runner_xxx/sendheaders-selfish-mining_xxx/node0/regtest/debug.log`. Note that the tmp files get cleaned up if the test passes, so make it fail with `assert()` at the end of `sendheaders-selfish-mining.py` to see these logs.

With D1442 applied: `build/test/functional/test_runner.py sendheaders-selfish-mining.py` and examine the logs at `/tmp/bitcoin_test_runner_xxx/sendheaders-selfish-mining_xxx/node0/regtest/debug.log`. Note that the tmp files get cleaned up if the test passes, so make it fail with `assert()` at the end of `sendheaders-selfish-mining.py` to see these logs.