tools/dnc: add verbose option to enable the log

Change-Id: If2efb47ecc2c8701ecc41e3318f716e5f584508f
diff --git a/tools/dnc/dnc.yaml b/tools/dnc/dnc.yaml
index adf3be1..661ecc5 100644
--- a/tools/dnc/dnc.yaml
+++ b/tools/dnc/dnc.yaml
@@ -7,4 +7,5 @@
 ip: "127.0.0.1"
 # certificate: "to/your/certificate.crt"
 # privateKey: "to/your/privatekey.pem"
-anonymous: true
\ No newline at end of file
+anonymous: true
+verbose: false
\ No newline at end of file