parallelize most system tests

bin/tests/system/cds/tests.sh

@@ -12,7 +12,7 @@ SYSTEMTESTTOP=..
 status=0
 n=0
 fail() {
-	echo "I:failed"
+	echo_i "failed"
 	status=`expr $status + 1`
 }
 
@@ -23,7 +23,7 @@ runcmd() {
 
 testcase() {
 	n=`expr $n + 1`
-	echo "I:$name ($n)"
+	echo_i "$name ($n)"
 	expect=$1
 	shift
 	result=`runcmd "$@"`
@@ -234,5 +234,5 @@ name='prefer CDNSKEY'
 out=DS.2-2
 testcase 0 $CDS -D -s -7200 -f sig.cds.cdnskey.2 -d DS.1 $Z
 
-echo "I:exit status: $status"
+echo_i "exit status: $status"
 [ $status -eq 0 ] || exit 1