* java/net/DatagramSocket.java
(ch): Description added.
(remotePort): Initialize with -1.
(connect): Doesnt throws SocketException.
* java/net/MulticastSocket.java
(setInterface): Merge with Classpath.
* java/net/ServerSocket.java
(closed): New member variable.
(bind): Check if socket is closed.
(close): Close an associated channel too, set new value to closed.
(isBound): Reindented.
(isClosed): Implemented.
* java/net/Socket.java
(closed): New member variable.
(bind): Check if socket is closed.
(connect): Check if socket is closed.
(close): Close an associated channel too, set new value to closed.
(isClosed): Implemented.