Merge remote-tracking branch 'origin/release' into dev

api/client.go

bindings/fileTransfer.go

cmd/fileTransfer.go

fileTransfer/ftMessages.proto

fileTransfer/manager.go

fileTransfer/params.go

fileTransfer/params_test.go

fileTransfer/send.go

fileTransfer/send_test.go

fileTransfer/sentRoundTracker.go

fileTransfer/sentRoundTracker_test.go

interfaces/params/CMIX.go

interfaces/params/rounds.go

network/gateway/sender.go

network/gateway/sender_test.go

network/gateway/utils_test.go

network/message/sendCmix.go

network/message/sendManyCmix.go

network/rounds/retrieve.go

network/rounds/utils_test.go