zte's code,first commit

Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/tr-encoding.d b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/tr-encoding.d
new file mode 100644
index 0000000..01bb62b
--- /dev/null
+++ b/ap/lib/libcurl/curl-7.54.1/docs/cmdline-opts/tr-encoding.d
@@ -0,0 +1,7 @@
+Long: tr-encoding
+Added: 7.21.6
+Help: Request compressed transfer encoding
+Protocols: HTTP
+---
+Request a compressed Transfer-Encoding response using one of the algorithms
+curl supports, and uncompress the data while receiving it.