Revert "Changed argument to vararg, to be able to specify 0-n reply addresses, but still be source compatible with the old call from the earlier version of the API."

This reverts commit 595a293a53238b203dc27776a96e8dd9fe126d10.
Revert "Reintroduced contribution that was lost in upstream merge."

This reverts commit 58f8a5657726f054ea935353fc110c7bdb1c7a70.