Merge 3.18.65 into android-3.18

Changes in 3.18.65
	tcp: avoid setting cwnd to invalid ssthresh after cwnd reduction states
	net: fix keepalive code vs TCP_FASTOPEN_CONNECT
	net: sched: set xt_tgchk_param par.nft_compat as 0 in ipt_init_target
	tcp: fastopen: tcp_connect() must refresh the route
	net: avoid skb_warn_bad_offload false positives on UFO
	packet: fix tp_reserve race in packet_set_ring
	revert "ipv4: Should use consistent conditional judgement for ip fragment in __ip_append_data and ip_finish_output"
	udp: consistently apply ufo or fragmentation
	ipv4: Should use consistent conditional judgement for ip fragment in __ip_append_data and ip_finish_output
	Linux 3.18.65

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>