Fix race in init

mobile/src/main/java/be/mygod/vpnhotspot/net/monitor/IpMonitor.kt

@@ -99,7 +99,7 @@ abstract class IpMonitor {
         }
     }
 
-    init {
+    protected fun init() {
         thread(name = "${javaClass.simpleName}-input") {
             val mode = currentMode
             if (mode.isMonitor) {

mobile/src/main/java/be/mygod/vpnhotspot/net/monitor/IpNeighbourMonitor.kt

@@ -57,6 +57,10 @@ class IpNeighbourMonitor private constructor() : IpMonitor() {
     }
     private var neighbours = persistentMapOf<IpDev, IpNeighbour>()
 
+    init {
+        init()
+    }
+
     override val monitoredObject: String get() = "neigh"
 
     override fun processLine(line: String) {