Move private_type_record() to conf.sh.common

The function 'private_type_record()' is now used in multiple system
setup scripts and should be moved to the common configuration script
conf.sh.common.

bin/tests/system/checkds/ns2/setup.sh

@@ -22,16 +22,6 @@ do
 	cp "../ns9/dsset-$subdomain.checkds$TP" .
 done
 
-private_type_record() {
-	_zone=$1
-	_algorithm=$2
-	_keyfile=$3
-
-	_id=$(keyfile_to_key_id "$_keyfile")
-
-	printf "%s. 0 IN TYPE65534 %s 5 %02x%04x0000\n" "$_zone" "\\#" "$_algorithm" "$_id"
-}
-
 zone="checkds"
 infile="checkds.db.infile"
 zonefile="checkds.db"