zte's code,first commit

Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/proxy-key.d b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/proxy-key.d
new file mode 100644
index 0000000..e61eb18
--- /dev/null
+++ b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/proxy-key.d
@@ -0,0 +1,5 @@
+Long: proxy-key
+Help: Private key for HTTPS proxy
+Arg: <key>
+---
+Same as --key but used in HTTPS proxy context.