shmem: update example config

etc/shmem.conf

@@ -3,40 +3,52 @@
 # via shared memory, and written back to an output file.
 
 stats = 1;
-debug = 10;
+
+logging = {
+	level = "info"
+}
 
 nodes = {
-	file = {
-		type = "file",
-		in = {
-			uri = "/var/log/villas/input.log",
-			rate = 2.0,
-			mode = "r",
-		},
-		out = {
-			uri = "/var/log/villas/output.log",
-			mode = "w"
-		},
-		vectorize = 1
+	sig = {
+		type = "signal"
 	},
 	shmem = {
 		type = "shmem",
-		out_name = "/villas1-out",
-		in_name = "/villas1-in",
-		signals = 4,
-		queuelen = 32,
-		polling = false,
-		vectorize = 1
+		out = {
+			name = "/villas1",
+		}
+		in = {
+			name = "/villas1",
+			signals = {
+				count = 1,
+				type = "float"
+			}
+		}
+	},
+	lo = {
+		type = "loopback",
+
+		format = "json"
+		uri = "-"
+
+		out = {
+			hooks = ( { type = "print", format = "json" })
+		}
 	}
-};
+}
+
+#
+# sig -> shmem -> lo
+#
 
 paths = (
 	{
-		in = "file",
-		out = "shmem",
-		reverse = true,
-		hooks = (
-			{ priority = 10, type = "print" }
-		)
+		in = "sig",
+		out = "shmem"
+	},
+	{
+		in = "shmem",
+		out = "lo",
 	}
-);
+
+)