make configs settable

network.go

@@ -9,6 +9,22 @@ import (
 
 type NetworkDevices []*NetworkDevice
 
+func (c *NetworkDevices) Set(index int, d *NetworkDevice) {
+	l := len(*c)
+	if index >= l {
+		n := make(NetworkDevices, index+1)
+		copy(n, *c)
+		n[index] = d
+		*c = n
+		return
+	}
+	if l == 0 {
+		*c = append(*c, d)
+		return
+	}
+	(*c)[index] = d
+}
+
 func (c NetworkDevices) Get(index int) *NetworkDevice {
 	if len(c)-1 >= index {
 		return c[index]