add ignore_incoming to user preferences, for automated testing of DSR topologies

src/mesh/mesh-pb-constants.cpp

@@ -64,3 +64,12 @@ bool writecb(pb_ostream_t *stream, const uint8_t *buf, size_t count)
     return false;
 #endif
 }
+
+bool is_in_helper(uint32_t n, const uint32_t *array, pb_size_t count)
+{
+    for (int i = 0; i < count; i++)
+        if (array[i] == n)
+            return true;
+
+    return false;
+}