[5303] Added comment in the apache example that it is for testing purposes.

doc/examples/https/httpd2/kea-httpd2.conf

@@ -6,6 +6,11 @@
 #   the certifiate authority (CA). The clients' certificates must
 #   be signed by the CA.
 #
+#   Note that the steps provided below to generate and setup certifcates
+#   are provided as an example for testing purposes only. Always
+#   consider best known security measures to protect your production
+#   environment.
+#
 #   The server certificate and key can be generated as follows:
 #
 #   openssl genrsa -des3 -out kea-proxy.key 4096