technotes are not part of doc bundle anymore. Links should be fixed

http://hg.openjdk.java.net/jdk9/dev/jdk/file/42f18c931bd4/src/java.base/share/classes/java/util/package-info.java

see 
  <li><a href="../../../technotes/guides/collections/overview.html"><b>Collections Framework Overview</b></a>
 *   <li><a href="../../../technotes/guides/collections/reference.html"><b>
 *        Collections Framework Annotated Outline</b></a>

and


 *     href="../../../technotes/guides/collections/designfaq.html"><b>Collections
 *     Framework Design FAQ</b></a>