overlay: nats-server.conf, janus, coturn, nats-server/turnserver binaries; f7hpb.sh install overlay and coturn permissions

overlay/etc/janus/janus.jcfg

@@ -268,7 +268,7 @@ media: {
 # be used for gathering candidates, and enable or disable the
 # internal libnice debugging, if needed.
 nat: {
-	stun_server = "global-hpb.f7cloud.ru" # HAND-EDIT
+	stun_server = ""
 	stun_port = 5349 # HAND-EDIT PORT-EDIT (443)
 	nice_debug = false
 	full_trickle = true # HAND-EDIT
@@ -330,7 +330,7 @@ nat: {
 	# by default; if that one is missing, the 'session_id' will be used as the
 	# username instead.
 	#turn_rest_api = "http://yourbackend.com/path/to/api"
-	turn_rest_api_key = "wU6fR0Eb0J4Aky5NuNeo3w==" # HAND-EDIT
+	turn_rest_api_key = ""
 	#turn_rest_api_method = "GET"
 	#turn_rest_api_timeout = 10