FYI - After a recent push, the v40-0001 patch no longer applies on the latest HEAD.
[postgres@CentOS7-x64 oss_postgres_misc]$ git apply ../patches_misc/v40-0001-Perform-streaming-logical-transactions-by-parall.patch error: patch failed: src/backend/replication/logical/launcher.c:54 error: src/backend/replication/logical/launcher.c: patch does not apply ------ Kind Regards, Peter Smith. Fujitsu Australia