zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/mail-auth.d b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/mail-auth.d
new file mode 100644
index 0000000..70cf0ed
--- /dev/null
+++ b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/mail-auth.d
@@ -0,0 +1,10 @@
+Long: mail-auth
+Arg: <address>
+Protocols: SMTP
+Help: Originator address of the original email
+Added: 7.25.0
+See-also: mail-rcpt mail-from
+---
+Specify a single address. This will be used to specify the authentication
+address (identity) of a submitted message that is being relayed to another
+server.