update(script): makes user able to pass additional custom option to driver-loader curl command

Signed-off-by: Andrea Bonanno <andrea@bonanno.cloud>

scripts/falco-driver-loader

@@ -626,6 +626,7 @@ print_usage() {
 	echo "  DRIVERS_REPO             specify different URL(s) where to look for prebuilt Falco drivers (comma separated)"
 	echo "  DRIVER_NAME              specify a different name for the driver"
 	echo "  DRIVER_INSECURE_DOWNLOAD whether you want to allow insecure downloads or not"
+ 	echo "  ADD_CURL_OPTIONS         specify additional options to be passed to curl command used to download Falco drivers"
 	echo ""
 	echo "Versions:"
 	echo "  Falco version  ${FALCO_VERSION}"
@@ -652,6 +653,8 @@ else
 	FALCO_DRIVER_CURL_OPTIONS=-fsS
 fi
 
+FALCO_DRIVER_CURL_OPTIONS+=" "${ADD_CURL_OPTIONS}
+
 if [[ -z "$MAX_RMMOD_WAIT" ]]; then
 	MAX_RMMOD_WAIT=60
 fi