kamailio.org: updated http links to git repository

- use https in the urls

etc/kamailio.cfg

@@ -1,12 +1,12 @@
 #!KAMAILIO
 #
 # Kamailio (OpenSER) SIP Server v5.1 - default configuration script
-#     - web: http://www.kamailio.org
-#     - git: http://sip-router.org
+#     - web: https://www.kamailio.org
+#     - git: https://github.com/kamailio/kamailio
 #
 # Direct your questions about this file to: <[email protected]>
 #
-# Refer to the Core CookBook at http://www.kamailio.org/wiki/
+# Refer to the Core CookBook at https://www.kamailio.org/wiki/
 # for an explanation of possible statements, functions and parameters.
 #
 # Note: the comments can be: