Disable tcp_tw_recycle

This is never needed and can introduce problems with NAT.

See https://vincent.bernat.im/en/blog/2014-tcp-time-wait-state-linux
for details

Change-Id: I65fcae0694dfc1124df4220a399bdc6cdb15d279
diff --git a/linux/system/single.yml b/linux/system/single.yml
index 928efda..d7e03e8 100644
--- a/linux/system/single.yml
+++ b/linux/system/single.yml
@@ -35,7 +35,6 @@
           net.ipv4.neigh.default.gc_thresh2: 8192
           net.ipv4.neigh.default.gc_thresh3: 16384
           net.core.netdev_max_backlog: 261144
-          net.ipv4.tcp_tw_recycle: 1
           net.ipv4.tcp_tw_reuse: 1
           kernel.panic: 60
       cpu: