Merge pull request #4654 from daniel-beck/fix-isDevelopment-comment

Fix comment about when this is set

core/src/main/java/hudson/Main.java

@@ -220,7 +220,8 @@ public class Main {
     public static boolean isUnitTest = false;
 
     /**
-     * Set to true if we are running inside {@code mvn hpi:run} or {@code mvn jetty:run}.
+     * Set to true if we are running inside {@code mvn jetty:run}.
+     * This is also set if running inside {@code mvn hpi:run} since plugins parent POM 2.30.
      */
     public static boolean isDevelopmentMode = SystemProperties.getBoolean(Main.class.getName()+".development");