Per bug report from Ronald Wahl <rwa@peppercon.com>:

Per bug report from Ronald Wahl <rwa@peppercon.com>:
    ...inet_pton breaks since tolower is implemented as
    a macro and its argument is evaluated more than once:

	while ((ch = tolower (*src++)) != '\0') {

So I fixed it by just undefining tolower() so we use the
function version, not the macro.
 -Erik