Improve javadocs for Socket class by adding references to SocketOptions

A DESCRIPTION OF THE REQUEST :
The description of TCP options (SO_LINGER, etc) in the Socket javadoc is rather sparse, there are much better descriptions in the SocketOptions javadoc though.
Currently however the Socket javadocs do not mention or reference SocketOptions. This should be changed so the Socket javadoc becomes more helpful.


JUSTIFICATION :
Most users are unaware of the SocketOptions javadoc since it is not mentioned in the Socket javadocs.

http://java.sun.com/j2se/1.5.0/docs/api/java/net/Socket.html