netinet/tcp.h: update to linux v5.7

add TCP_NLA_BYTES_NOTSENT and new tcp_zerocopy_receive fields, see

  linux commit c8856c051454909e5059df4e81c77b9c366c5515
  tcp-zerocopy: Return inq along with tcp receive zerocopy.

  linux commit 33946518d493cdf10aedb4a483f1aa41948a3dab
  tcp-zerocopy: Return sk_err (if set) along with tcp receive zerocopy.

  linux commit e08ab0b377a1489760533424437c5f4be7f484a4
  tcp: add bytes not sent to SCM_TIMESTAMPING_OPT_STATS

include/netinet/tcp.h

@@ -79,6 +79,7 @@ enum {
 	TCP_NLA_REORD_SEEN,
 	TCP_NLA_SRTT,
 	TCP_NLA_TIMEOUT_REHASH,
+	TCP_NLA_BYTES_NOTSENT,
 };
 
 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
@@ -284,6 +285,8 @@ struct tcp_zerocopy_receive {
 	uint64_t address;
 	uint32_t length;
 	uint32_t recv_skip_hint;
+	uint32_t inq;
+	int32_t err;
 };
 
 #endif