Support for using inet_ntop() was originally added to support IPv6,
and only used for IPv6 addresses in AuthAudit(). Two decades later,
support for inet_ntop() is ubiquitous and OS'es have marked inet_ntoa()
as deprecated, so use the modern interface for IPv4 as well now.
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1760>