zte's code,first commit

Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/tlsv1.3.d b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/tlsv1.3.d
new file mode 100644
index 0000000..7d9640e
--- /dev/null
+++ b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/tlsv1.3.d
@@ -0,0 +1,9 @@
+Long: tlsv1.3
+Help: Use TLSv1.3
+Protocols: TLS
+Added: 7.52.0
+---
+Forces curl to use TLS version 1.3 when connecting to a remote TLS server.
+
+Note that TLS 1.3 is only supported by a subset of TLS backends. At the time
+of writing this, those are BoringSSL and NSS only.