Add internal API for filters and filter for synchronized statement (#501)

diff --git a/org.jacoco.doc/docroot/doc/changes.html b/org.jacoco.doc/docroot/doc/changes.html
index 80d7fb7..c73b155 100644
--- a/org.jacoco.doc/docroot/doc/changes.html
+++ b/org.jacoco.doc/docroot/doc/changes.html
@@ -25,6 +25,9 @@
   <li>Exclude from a report enum methods <code>valueOf</code> and <code>values</code>
       that are created by compiler
       (GitHub <a href="https://github.com/jacoco/jacoco/issues/491">#491</a>).</li>
+  <li>Exclude from a report a part of bytecode that compiler generates for a
+      synchronized statement
+      (GitHub <a href="https://github.com/jacoco/jacoco/issues/501">#501</a>).</li>
   <li>Maven aggregated reports will now also include modules of runtime dependencies
       (GitHub <a href="https://github.com/jacoco/jacoco/issues/498">#498</a>).</li>
 </ul>