Update storageos api dependency to 0.3.4

vendor/github.com/storageos/go-api/netutil/errors.go

@@ -0,0 +1,26 @@
+package netutil
+
+import (
+	"errors"
+	"fmt"
+	"github.com/storageos/go-api/serror"
+	"strings"
+)
+
+func errAllFailed(addrs []string) error {
+	msg := fmt.Sprintf("failed to dial all known cluster members, (%s)", strings.Join(addrs, ","))
+	help := "ensure that the value of $STORAGEOS_HOST (or the -H flag) is correct, and that there are healthy StorageOS nodes in this cluster"
+
+	return serror.NewTypedStorageOSError(serror.APIUncontactable, nil, msg, help)
+}
+
+func newInvalidNodeError(err error) error {
+	msg := fmt.Sprintf("invalid node format: %s", err)
+	help := "please check the format of $STORAGEOS_HOST (or the -H flag) complies with the StorageOS JOIN format"
+
+	return serror.NewTypedStorageOSError(serror.InvalidHostConfig, err, msg, help)
+}
+
+var errNoAddresses = errors.New("the MultiDialer instance has not been initialised with client addresses")
+var errUnsupportedScheme = errors.New("unsupported URL scheme")
+var errInvalidPortNumber = errors.New("invalid port number")