curl: add new option HTTP AUTH

curl: add new option HTTP AUTH

The '--enable-http-auth' compile option in cURL is used to enable support
for HTTP authentication methods. This option allows cURL to handle various
authentication schemes, such as Basic, Digest, NTLM, and others, which
are commonly used in HTTP requests to secure access to resources.

This cURL compile option is default disabled. This should at least be enabled
as a compile option in OpenWrt so that it can be switched on if needed.

Signed-off-by: Florian Eckert <[email protected]>