const crypto/x509.ExtKeyUsageClientAuth

7 uses

	crypto/x509 (current package)
		x509.go#L637: 	ExtKeyUsageClientAuth                                        // clientAuth
		x509.go#L658: 	{ExtKeyUsageClientAuth, oidExtKeyUsageClientAuth},
		x509_string.go#L66: 	_ = x[ExtKeyUsageClientAuth-2]

	crypto/tls
		handshake_server.go#L529: 		KeyUsages:   []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},
		handshake_server.go#L972: 			KeyUsages:     []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},
		handshake_server_tls13.go#L376: 			KeyUsages:   []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},

	github.com/refraction-networking/utls
		handshake_server.go#L940: 			KeyUsages:     []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},