Re: `ifstated -n' more useful error message

[Michael McConville]

Michael Reed wrote:
> If fopen("/etc/ifstated.conf", ...) fails for whatever reason the
> error message isn't very helpful:
> 
>   $ ifstated -n
>   ifstated: /etc/ifstated.conf
> 
> With this patch:
> 
>   $ ./ifstated -n
>   ifstated: /etc/ifstated.conf: No such file or directory

Committed. Thanks!

I also converted ~13 uses of this general form:

> errx(1, "parse_config malloc");

To this:

> err(1, NULL);