RFR: 8061618: Removed unused networking functions from os class

[Frederic Parain]

Please review this simple fix which removes the following
dead methods from the os class:

os::socket_shutdown()
os::timeout()
os::timeout()
os::listen()
os::bind()
os::accept()
os::recvfrom()
os::get_sock_name()
os::sendto()
os::socket_available()
os::get_sock_opt()
os::set_sock_opt()
os::get_host_name()

CR:
https://bugs.openjdk.java.net/browse/JDK-8061618

Webrev:
http://cr.openjdk.java.net/~fparain/8061618/webrev.00/

Testing has been done by re-building the VM on all platforms
(with JPRT) without these methods, no build fails.

Thank you,

Fred

-- 
Frederic Parain - Oracle
Grenoble Engineering Center - France
Phone: +33 4 76 18 81 17
Email: Frederic.Parain at oracle.com