We never use interface names on Windows, avoid retrieving them
We're scanning local interfaces more often in the tor codebase, so it would be a good idea to optimise get_interface_addresses_win32().
We never use the interface names, so let's avoid retrieving them by passing GAA_FLAG_SKIP_FRIENDLY_NAME in FLAGS.
Reference documentation: https://msdn.microsoft.com/en-us/library/windows/desktop/aa365915%28v=vs.85%29.aspx