This extended timeout will be used in case there is an GRE stream
detected.
+nf_hooks_lwtunnel - BOOLEAN
+ - 0 - disabled (default)
+ - not 0 - enabled
+
+ If this option is enabled, the lightweight tunnel netfilter hooks are
+ enabled. This option cannot be disabled once it is enabled.
+
nf_flowtable_tcp_timeout - INTEGER (seconds)
default 30