zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/krb.d b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/krb.d
new file mode 100644
index 0000000..19547af
--- /dev/null
+++ b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/krb.d
@@ -0,0 +1,11 @@
+Long: krb
+Arg: <level>
+Help: Enable Kerberos with security <level>
+Protocols: FTP
+Requires: Kerberos
+---
+Enable Kerberos authentication and use. The level must be entered and should
+be one of 'clear', 'safe', 'confidential', or 'private'. Should you use a
+level that is not one of these, 'private' will instead be used.
+
+If this option is used several times, the last one will be used.