Add initial support for iperf3, both in client and server modes.

Signed-off-by: Adam Israel <adam.israel@canonical.com>
diff --git a/layers/netutils/config.yaml b/layers/netutils/config.yaml
new file mode 100644
index 0000000..6101063
--- /dev/null
+++ b/layers/netutils/config.yaml
@@ -0,0 +1,5 @@
+options:
+    iperf3:
+        type: boolean
+        default: false
+        description: "Enabling this option will start iperf3 in server mode."