[Fix] curl should fail if something wrong, fix #1556

[PeterDaveHello]

from curl man page:

 -f, --fail
              (HTTP) Fail silently (no output at all) on server errors. This is mostly done to better enable scripts  etc  to  better  deal
              with failed attempts. In normal cases when an HTTP server fails to deliver a document, it returns an HTML document stating so
              (which often also describes why and more). This flag will prevent curl from outputting that and return error 22.

[ljharb]

Can you confirm which versions of curl have this support?

[PeterDaveHello]

From the beginning: curl/curl@ae1912c, see: https://github.com/curl/curl/blob/ae1912cb0d494b48d514d937826c9fe83ec96c4d/src/main.c#L99

[ljharb]

Seems good; can you provide the output that this change causes from the command in #1556?

[PeterDaveHello]

curl: (22) The requested URL returned error: 404 Not Found