Drop references to TLS objects earlier

BZ69910
It should be safe to null TLS objects as soon as the socket is closed,
which will improve garbage collection efficiency.

Author: rmaucher

java/org/apache/tomcat/util/net/NioEndpoint.java

@@ -1254,6 +1254,7 @@ protected void doClose() {
                     getSocket().close(true);
                 }
                 if (getEndpoint().running) {
+                    getSocket().reset(null, null);
                     if (nioChannels == null || !nioChannels.push(getSocket())) {
                         getSocket().free();
                     }

webapps/docs/changelog.xml

@@ -227,6 +227,10 @@
         Improve warnings when setting ciphers lists in the FFM code, mirrorring
         the tomcat-native changes. (remm)
       </fix>
+      <fix>
+        <bug>69910</bug>: Dereference TLS objects right after closing a socket
+        to improve memory efficiency. (remm)
+      </fix>
     </changelog>
   </subsection>
   <subsection name="Jasper">