BigPipe's Varnish documentation does not apply to Varnish 4

Reported at #2644146-9: BigPipe Varnish documentation: Surrogate-Control header value's future evolution? by @bugsonly:

fyi,

for current Varnish v4, vcl_fetch() has been replaced by vcl_backend_response(), cref: https://www.varnish-cache.org/docs/4.0/whats-new/upgrading.html#vcl-fetc...

and,

    set beresp.ttl = 0;

throws a VCL compile error

Jan 18 11:18:04 test.loc varnishd[11250]: Error:
Jan 18 11:18:04 test.loc varnishd[11250]: Message from VCC-compiler:
Jan 18 11:18:04 test.loc varnishd[11250]: Expected ID got ';'
Jan 18 11:18:04 test.loc varnishd[11250]: (program line 166), at
Jan 18 11:18:04 test.loc varnishd[11250]: ('input' Line 437 Pos 35)
Jan 18 11:18:04 test.loc varnishd[11250]: set beresp.ttl = 0;
Jan 18 11:18:04 test.loc varnishd[11250]: ----------------------------------#
Jan 18 11:18:04 test.loc varnishd[11250]: Running VCC-compiler failed, exited with 2
Jan 18 11:18:04 test.loc varnishd[11250]: VCL compilation failed

should be, instead,

    set beresp.ttl = 0s;