zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/socks4.d b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/socks4.d
new file mode 100644
index 0000000..11f6ae0
--- /dev/null
+++ b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/socks4.d
@@ -0,0 +1,19 @@
+Long: socks4
+Arg: <host[:port]>
+Help: SOCKS4 proxy on given host + port
+Added: 7.15.2
+---
+Use the specified SOCKS4 proxy. If the port number is not specified, it is
+assumed at port 1080.
+
+This option overrides any previous use of --proxy, as they are mutually
+exclusive.
+
+Since 7.21.7, this option is superfluous since you can specify a socks4 proxy
+with --proxy using a socks4:// protocol prefix.
+
+Since 7.52.0, --preproxy can be used to specify a SOCKS proxy at the same time
+--proxy is used with an HTTP/HTTPS proxy. In such a case curl first connects to
+the SOCKS proxy and then connects (through SOCKS) to the HTTP or HTTPS proxy.
+
+If this option is used several times, the last one will be used.