Update pynetflow (additional performance improvements)

grafolean · grafolean · commit d1066c2a6ce8 · 2020-02-23T16:11:50.000+01:00
diff --git a/pynetflow b/pynetflow
@@ -1 +1 @@
-Subproject commit 19c4da89e8c794089854ce605c1150fa6c5a130d
+Subproject commit 84c263f2714f60c79a424e7e004aa8aeff7db949
