func net/http.cloneOrMakeHeader

3 uses

	net/http (current package)
		client.go#L243: 		req.Header = cloneOrMakeHeader(ireq.Header)
		client.go#L754: 		ireqhdr  = cloneOrMakeHeader(ireq.Header)
		clone.go#L68: func cloneOrMakeHeader(hdr Header) Header {