docs(REST API): use -T instead of --data-binary for cURL

Because `--data-binary` loads the whole data in memory which isn't compatible with big data like a VHD file, whereas `-T` streams the data to the server.

docs/restapi.md

@@ -147,9 +147,10 @@ A VHD can be imported on an SR to create a VDI at `/rest/v0/srs/<sr uuid>/vdis`.
 
 ```bash
 curl \
-  -b authenticationToken=KQxQdm2vMiv7jBIK0hgkmgxKzemd8wSJ7ugFGKFkTbs \
+  -X POST \
   -H 'Content-Type: application/octet-stream' \
-  --data-binary @myDisk.vhd \
+  -b authenticationToken=KQxQdm2vMiv7jBIK0hgkmgxKzemd8wSJ7ugFGKFkTbs \
+  -T myDisk.vhd \
   'https://xo.example.org/rest/v0/srs/357bd56c-71f9-4b2a-83b8-3451dec04b8f/vdis?name_label=my_imported_VDI' \
   | cat
 ```

packages/xo-server/docs/rest-api.md

@@ -144,9 +144,10 @@ A VHD can be imported on an SR to create a VDI at `/rest/v0/srs/<sr uuid>/vdis`.
 
 ```bash
 curl \
-  -b authenticationToken=KQxQdm2vMiv7jBIK0hgkmgxKzemd8wSJ7ugFGKFkTbs \
+  -X POST \
   -H 'Content-Type: application/octet-stream' \
-  --data-binary @myDisk.vhd \
+  -b authenticationToken=KQxQdm2vMiv7jBIK0hgkmgxKzemd8wSJ7ugFGKFkTbs \
+  -T myDisk.vhd \
   'https://xo.company.lan/rest/v0/srs/357bd56c-71f9-4b2a-83b8-3451dec04b8f/vdis?name_label=my_imported_VDI' \
   | cat
 ```