zte's code,first commit

Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/ftp-pret.d b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/ftp-pret.d
new file mode 100644
index 0000000..dac4c35
--- /dev/null
+++ b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/ftp-pret.d
@@ -0,0 +1,8 @@
+Long: ftp-pret
+Help: Send PRET before PASV
+Protocols: FTP
+Added: 7.20.0
+---
+Tell curl to send a PRET command before PASV (and EPSV). Certain FTP servers,
+mainly drftpd, require this non-standard command for directory listings as
+well as up and downloads in PASV mode.