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7470c00d4d
These options are confusing and redundant. Their names suggest they apply to the tcp:// transport, yet they are used for all stream protocols. The methods zmq::set_tcp_receive_buffer and zmq::set_tcp_send_buffer don't use these values at all, they use ZMQ_SNDBUF and ZMQ_RCVBUF. Solution: merge these new options into ZMQ_SNDBUF and ZMQ_RCVBUF. This means defaulting these two options to 8192, and removing the new options. We now have ZMQ_SNDBUF and ZMQ_RCVBUF being used both for TCP socket control, and for input/output buffering. Note: the default for SNDBUF and RCVBUF are otherwise 4096.