add version constants for draft-29 and draft-32

internal/protocol/version.go

@@ -21,6 +21,8 @@ const (
 	VersionTLS      VersionNumber = 0x51474fff
 	VersionWhatever VersionNumber = 1 // for when the version doesn't matter
 	VersionUnknown  VersionNumber = math.MaxUint32
+	VersionDraft29  VersionNumber = 0xff00001d
+	VersionDraft32  VersionNumber = 0xff000020
 )
 
 // SupportedVersions lists the versions that the server supports
@@ -38,6 +40,10 @@ func (vn VersionNumber) String() string {
 		return "whatever"
 	case VersionUnknown:
 		return "unknown"
+	case VersionDraft29:
+		return "draft-29"
+	case VersionDraft32:
+		return "draft-32"
 	case VersionTLS:
 		return "TLS dev version (WIP)"
 	default: