[CFR] reflect resolv.conf update to running application

[Dag-Erling Smørgrav]

Hajimu UMEMOTO <ume at freebsd.org> writes:
> +		if diff /etc/resolv.conf.std /etc/resolv.conf >/dev/null 2>&1; then
> +			rm -f /etc/resolv.conf.std
> +			return 0
> +		fi
> +

use 'cmp -s' instead of diff.  It returns 0 when the files are
identical, 1 when they differ and 2 when one of the files does not
exist or is not readable, and never prints anything.

DES
-- 
Dag-Erling Smørgrav - des at des.no