Take two: When writing binary logs, always include Begin/End/Link tags
Take two: When writing binary logs, always include Begin/End/Link tags

Apologies for the bad version in 1f32c1597a0927e3cd0f728069613e3377572a83

Closes #2852

gquintard/Varnish-Cache,gquintard/Varnish-Cache,gquintard/Varnish-Cache,gquintard/Varnish-Cache