David Beitey cfe4ae1668 luci-app-ddns: check existence of nslookup util rather than making DNS request ... This saves a DNS request whenever the check is performed. For systems with nameservers configured in `/etc/resolv.conf`, nslookup will sent a request to those servers (eg bypassing /etc/hosts), thus taking a lot more time than necessary. For servers that are remote, this will take a *lot* longer than just checking if the nslookup util exists. This change follows in the same vein as all the other checks and just using `which` without actually invoking the util's functionality. Signed-off-by: David Beitey <david@davidjb.com>		2018-12-21 12:54:54 +10:00
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ddns.lua	luci-app-ddns: check existence of nslookup util rather than making DNS request	2018-12-21 12:54:54 +10:00