Workaround for apache-rat-plugin 0.13 which doesn't accept https URLs
diff --git a/pom.xml b/pom.xml
index b2eccfa..51a0050 100644
--- a/pom.xml
+++ b/pom.xml
@@ -160,6 +160,17 @@
           <groupId>org.apache.rat</groupId>
           <artifactId>apache-rat-plugin</artifactId>
           <configuration>
+            <licenses>
+              <!-- TODO (low prio): Remove this simple workaround when Apache Rat 0.14 has been released. -->
+              <!-- See also: https://issues.apache.org/jira/browse/RAT-212 -->
+              <!-- and       https://issues.apache.org/jira/browse/LEGAL-265 -->
+              <license implementation="org.apache.rat.analysis.license.ApacheSoftwareLicense20">
+                <notes>Also allow the license url to be https.</notes>
+                <patterns>
+                  <pattern>https://www.apache.org/licenses/LICENSE-2.0</pattern>
+                </patterns>
+              </license>
+            </licenses>
             <excludeSubProjects>true</excludeSubProjects>
             <excludes>
               <!-- MAVEN_DEFAULT_EXCLUDES -->