Adding a module to allow organizations to track usage of Jenkins within their domain.

There is a privacy concern in having this information reported, but OTOH
in a corporate network this seems like a reasonable compromise, and
people really often do not have any clues where they are running.

war/pom.xml

@@ -106,6 +106,11 @@ THE SOFTWARE.
       <version>2.3</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.jenkins-ci.modules</groupId>
+      <artifactId>domain-discovery</artifactId>
+      <version>1.0</version>
+    </dependency>
     <dependency>
       <groupId>org.jenkins-ci.modules</groupId>
       <artifactId>instance-identity</artifactId>