blockcheck: curl version display

blockcheck.sh

@@ -403,6 +403,8 @@ check_system()
 	esac
 	echo $UNAME${SUBSYS:+/$SUBSYS} detected
 	echo firewall type is $FWTYPE
+	echo CURL=${CURL:-curl}
+	${CURL:-curl} --version
 }
 
 zp_already_running()