Sync netinet/tcp.h with upstream Linux kernel.

Sync netinet/tcp.h with upstream Linux kernel.

	[BZ# 15003]
	* sysdeps/gnu/netinet/tcp.h (TCP_COOKIE_TRANSACTIONS,
	TCP_THIN_LINEAR_TIMEOUTS, TCP_THIN_DUPACK, TCP_USER_TIMEOUT,
	TCP_REPAIR, TCP_REPAIR_QUEUE, TCP_QUEUE_SEQ, TCP_REPAIR_OPTIONS,
	TCP_FASTOPEN): Define.
	(tcp_repair_opt): New structure.
	(TCP_NO_QUEUE, TCP_RECV_QUEUE, TCP_SEND_QUEUE, TCP_QUEUES_NR): New
	enum values.
	(TCP_COOKIE_MIN, TCP_COOKIE_MAX, TCP_COOKIE_PAIR_SIZE,
	TCP_COOKIE_IN_ALWAYS, TCP_COOKIE_OUT_NEVER, TCP_S_DATA_IN,
	TCP_S_DATA_OUT, TCP_MSS_DEFAULT, TCP_MSS_DESIRED): Define.
	(tcp_cookie_transactions): New structure.