RFR: JDK-8080990: libdt_socket/socket_md.c(202) : warning C4996: 'gethostbyname': Use getaddrinfo() or GetAddrInfoW()

[Gary Adams]

Here's a first pass attempt to remove the -D_WINSOCK_DEPRECATED_NO_WARNINGS
build flag and update the winsock deprecated functions.

   Issue: https://bugs.openjdk.java.net/browse/JDK-8080990
   Webrev: http://cr.openjdk.java.net/~gadams/8080990/

These are the initial deprecated functions updated:
    gethostbyname -> getaddrinfo
    inet_addr -> inet_pton
    inet_ntoa -> inet_ntop

I'm not sure how to replace the existing WSASendDisconnect calls.
It's not clear that it actually provides a graceful disconnect.