Interface closeWriter

tailcat.go:1790–1792

closeWriter is implemented by TCP-like connections (such as [net.TCPConn] and gVisor's gonet.TCPConn) that can shut down just their writing side.

// [net.TCPConn] and gVisor's gonet.TCPConn) that can shut down just
// their writing side.
type closeWriter interface {
	CloseWrite() error
}

// ProxyConns copies data between a and b in both directions until
// both sides have finished, then closes both connections.