Update pynetflow (performance)

grafolean · grafolean · commit 86b5c1d19c93 · 2020-02-23T14:39:41.000+01:00
diff --git a/pynetflow b/pynetflow
@@ -1 +1 @@
-Subproject commit b0bed8126a3b0b45f161726ba3815852ea97c57e
+Subproject commit 19c4da89e8c794089854ce605c1150fa6c5a130d
