Don't allow references to the java.sql JPMS module

Author: garydgregory

src/conf/checkstyle/import-control.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0"?>
+<!--
+Licensed to the Apache Software Foundation (ASF) under one or more
+contributor license agreements.  See the NOTICE file distributed with
+this work for additional information regarding copyright ownership.
+The ASF licenses this file to You under the Apache License, Version 2.0
+(the "License"); you may not use this file except in compliance with
+the License.  You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+<!DOCTYPE import-control PUBLIC
+    "-//Checkstyle//DTD ImportControl Configuration 1.4//EN"
+    "https://checkstyle.org/dtds/import_control_1_4.dtd">
+<import-control pkg="org.apache.commons.lang3" strategyOnMismatch="allowed">
+  <disallow pkg="java.sql" />
+  <disallow pkg="javax.sql" />
+</import-control>

src/site/resources/checkstyle/checkstyle.xml

@@ -85,5 +85,9 @@ limitations under the License.
     <module name="UpperEll" />
     <module name="WhitespaceAfter"/>
     <module name="WhitespaceAround"/>
+    <module name="ImportControl">
+      <property name="file" value="src/conf/checkstyle/import-control.xml"/>
+      <property name="path" value="^.*[\\/]src[\\/]main[\\/].*$"/>
+    </module>
  </module>
 </module>