RFR:8190843 can not set/get extendedOptions to ServerSocket

[vyom tewari]

Hi All,

Please review the small code change for the below issue.
Webrev     : 
http://cr.openjdk.java.net/~vtewari/8190843/webrev0.0/index.html

BugId        : https://bugs.openjdk.java.net/browse/JDK-8190843

In this code change, i removed the check(getSocket() == null) which will 
always be true for ServerSocket as in case of server socket we set 
"serverSocket" not "socket".

Thanks,

Vyom