netmap: optionally disable offloading

src/source-netmap.c

@@ -294,7 +294,11 @@ static int NetmapOpen(char *ifname, int promisc, NetmapDevice **pdevice, int ver
     }
 
     /* netmap needs all offloading to be disabled */
+    if (LiveGetOffload() == 0) {
         (void)GetIfaceOffloading(ifname, 1, 1);
+    } else {
+        DisableIfaceOffloading(ifname, 1, 1);
+    }
 
     /* not found, create new record */
     pdev = SCMalloc(sizeof(*pdev));