8044766: New jdk.net classes have @since 1.9 tags in 8u20

Reviewed-by: chegar

src/share/classes/jdk/net/ExtendedSocketOptions.java

@@ -31,8 +31,6 @@ import java.net.SocketOption;
  * Defines extended socket options, beyond those defined in
  * {@link java.net.StandardSocketOptions}. These options may be platform
  * specific.
- *
- * @since 1.9
  */
 @jdk.Exported
 public final class ExtendedSocketOptions {

src/share/classes/jdk/net/NetworkPermission.java

@@ -57,8 +57,6 @@ import java.security.BasicPermission;
  * </tr></table>
  *
  * @see jdk.net.ExtendedSocketOptions
- *
- * @since 1.9
  */
 
 @jdk.Exported

src/share/classes/jdk/net/SocketFlow.java

@@ -42,8 +42,6 @@ import java.lang.annotation.Native;
  * <p>
  * When a security manager is installed, a {@link NetworkPermission}
  * is required to set or get this option.
- *
- * @since 1.9
  */
 @jdk.Exported
 public class SocketFlow {
@@ -65,8 +63,6 @@ public class SocketFlow {
      * socket option. Both setting and getting the option return
      * one of these statuses, which reflect the state of socket's
      * flow.
-     *
-     * @since 1.9
      */
     @jdk.Exported
     public enum Status {

src/share/classes/jdk/net/package-info.java

@@ -26,8 +26,6 @@
 /**
  * Platform specific socket options for the {@code java.net} and {@code java.nio.channels}
  * socket classes.
- *
- * @since 1.9
  */
 
 @jdk.Exported