zte's code,first commit

Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/append.d b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/append.d
new file mode 100644
index 0000000..f001b12
--- /dev/null
+++ b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/append.d
@@ -0,0 +1,8 @@
+Short: a
+Long: append
+Help: Append to target file when uploading
+Protocols: FTP SFTP
+---
+When used in an upload, this makes curl append to the target file instead of
+overwriting it. If the remote file doesn't exist, it will be created.  Note
+that this flag is ignored by some SFTP servers (including OpenSSH).