Fix test 18 on Solaris.
Fix test 18 on Solaris.


threatstack/libldns,gegenschall/ldns,NLnetLabs/ldns,gegenschall/ldns,benlaurie/ldns,NLnetLabs/ldns,gegenschall/ldns,threatstack/libldns,threatstack/libldns,threatstack/libldns,gegenschall/ldns,benlaurie/ldns,benlaurie/ldns,NLnetLabs/ldns,NLnetLabs/ldns,benlaurie/ldns,threatstack/libldns