upgrading to v4, change of "req.backend.healthy" -> "std.healthy(req.backend)" reports "Symbol not found: 'std.healthy' (expected type BOOL)"

[grantksupport at operamail.com]

On Sun, May 4, 2014, at 12:44 PM, Dridi Boukelmoune wrote:
> Did you actually import the std module in you VCL ?

No.  I'm following

https://www.varnish-cache.org/docs/trunk/whats-new/upgrading.html#obj-in-vcl-error-replaced-by-beresp-in-vcl-backend-error

It did not instruct to do any such import.

Looking for how to, now ...