added SPDX identifiers to email, exports, and htmlcheck packages, and to the setup database scripts

exports/vcard_xml.go

@@ -5,6 +5,8 @@
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * SPDX-License-Identifier: MPL-2.0
  */
 // Package exports contains interfacing code for external data formats.
 package exports

exports/vcif_xml.go

@@ -5,6 +5,8 @@
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * SPDX-License-Identifier: MPL-2.0
  */
 // Package exports contains interfacing code for external data formats.
 package exports

exports/viu_xml.go

@@ -5,6 +5,8 @@
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * SPDX-License-Identifier: MPL-2.0
  */
 // Package exports contains interfacing code for external data formats.
 package exports