zte's code,first commit

Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/mail-from.d b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/mail-from.d
new file mode 100644
index 0000000..1d93234
--- /dev/null
+++ b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/mail-from.d
@@ -0,0 +1,8 @@
+Long: mail-from
+Arg: <address>
+Help: Mail from this address
+Protocols: SMTP
+Added: 7.20.0
+See-also: mail-rcpt mail-auth
+---
+Specify a single address that the given mail should get sent from.