version: Add CheckVersion() function

version/version.go

@@ -153,3 +153,14 @@ func Version() string {
 	v = fmt.Sprintf("%s (%s)", v, strings.Join(extra, ", "))
 	return v
 }
+
+func CheckVersion(version, minimumVersion string) bool {
+	if version == "dev-snapshot" {
+		return true
+	}
+	if semver.Compare(version, minimumVersion) < 0 {
+		// log.Debug("version too old", "v", cl.Version.Version)
+		return false
+	}
+	return true
+}