comment out the ca.pem by default

kamailio/tls.cfg

@@ -20,7 +20,7 @@ require_certificate = no
 #crl = /etc/kazoo/kamailio/certs/crl.pem
 certificate = /etc/kazoo/kamailio/certs/cert.pem
 private_key = /etc/kazoo/kamailio/certs/key.pem
-ca_list = /etc/kazoo/kamailio/certs/ca.pem
+#ca_list = /etc/kazoo/kamailio/certs/ca.pem
 
 # This is the default client domain, settings
 # in this domain will be used for all outgoing