Today, the driver_netio test server binds to the wildcard address
(0.0.0.0).  This may trigger a firewall alert on Windows 7, and the
alert UI window may interfere with user32:msg tests.

Fix this by binding to the loopback address (127.0.0.1) instead.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=53891
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=54202