These two test-cases cannot work if streaming is allowed.
Add a debugging vsl to indicate when we enable streaming.

This should possibly be an official VSL record ?
Allow streaming for secondary requests.
Have SLT_Fetch_Body report if we're streaming or not.
Spelling
Correctly bail if there is insuficient storage for ESI data clone
on IMS fetch.
Go over and abstract the completion (good or bad) of backend fetches
to reduce code duplication a little bit.
Language, typos, XXX rather than asdasoidwqjwqdasdas
rename "rxhdrs" to "rxreqhdrs" and add "rxresphdrs"
There is no `y' (year) suffix
More spelling fixes
A few more spelling fixes
Spotted while looking for 1449:

Make sure we do not send a regular "end-chunk" to the
client if the streaming fetch fails.
Add a test-case to check that vcl_backend_error{} objects can be cached.
Fix a race when we Unbusy and abandonned oc which has no object.

Fixes	#1449
Fix URL
Typos and itsos