New RTYPE: DS records now supported! (#753)

Thanks to @haraldkoch for starting this, @McNetic for picking it up.

* Added DS record type

* Added DS for cloudflare provider with tests

* Removed DS validation, fixed parse test

* Added generated files

* Added dnsimple ds record

* Regenerated documentation matrix

* rebased and regenerated

* Updated integration tests

* Rebase and regenerate

* Enable DS record type for provider desec

* Added DS record type

* Added DS for cloudflare provider with tests

* Removed DS validation, fixed parse test

* Added generated files

* Added dnsimple ds record

* Regenerated documentation matrix

* rebased and regenerated

* Updated integration tests

* Rebase and regenerate

* Enable DS record type for provider desec

* Rebase and fixes

Co-authored-by: Robert Koch <robert@kochie.io>
Co-authored-by: Nicolai Ehemann <nicolai.ehemann@enerko-informatik.de>

models/t_ds.go

@@ -0,0 +1,54 @@
+package models
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/pkg/errors"
+)
+
+// SetTargetDS sets the DS fields.
+func (rc *RecordConfig) SetTargetDS(keytag uint16, algorithm, digesttype uint8, digest string) error {
+	rc.DsKeyTag = keytag
+	rc.DsAlgorithm = algorithm
+	rc.DsDigestType = digesttype
+	rc.DsDigest = digest
+
+	if rc.Type == "" {
+		rc.Type = "DS"
+	}
+	if rc.Type != "DS" {
+		panic("assertion failed: SetTargetDS called when .Type is not DS")
+	}
+
+	return nil
+}
+
+// SetTargetDSStrings is like SetTargetDS but accepts strings.
+func (rc *RecordConfig) SetTargetDSStrings(keytag, algorithm, digesttype, digest string) error {
+	u16keytag, err := strconv.ParseUint(keytag, 10, 16)
+	if err != nil {
+		return errors.Wrap(err, "DS KeyTag can't fit in 16 bits")
+	}
+	u8algorithm, err := strconv.ParseUint(algorithm, 10, 8)
+	if err != nil {
+		return errors.Wrap(err, "DS Algorithm can't fit in 8 bits")
+	}
+	u8digesttype, err := strconv.ParseUint(digesttype, 10, 8)
+	if err != nil {
+		return errors.Wrap(err, "DS DigestType can't fit in 8 bits")
+	}
+
+	return rc.SetTargetDS(uint16(u16keytag), uint8(u8algorithm), uint8(u8digesttype), digest)
+}
+
+// SetTargetDSString is like SetTargetDS but accepts one big string.
+func (rc *RecordConfig) SetTargetDSString(s string) error {
+	part := strings.Fields(s)
+	if len(part) != 4 {
+		return errors.Errorf("DS value does not contain 5 fields: (%#v)", s)
+	}
+	fmt.Println(part)
+	return rc.SetTargetDSStrings(part[0], part[1], part[2], part[3])
+}