remove unnecessary dependancies from checktool, dighost, dnssectool and rndcutil
remove unnecessary dependancies from checktool, dighost, dnssectool and rndcutil

pecharmin/bind9,each/bind9-collab,pecharmin/bind9,each/bind9-collab,pecharmin/bind9,pecharmin/bind9,pecharmin/bind9,pecharmin/bind9,each/bind9-collab,each/bind9-collab,each/bind9-collab,each/bind9-collab