Found & Fixed by:	Martin

Fixes	#978

Found & Fixed by:	Martin

Fixes	#979

	we transform (gzip/gunzip)
	we stream and backend didn't send c-l.

Fixes	#980

Testcase by:	Martin

non-busy.  Not sure what I thought when I changed it last, but it
was clearly not smart thinking.

Spotted by:	Martin
Test case by:	Martin

Fixes	#963

If the first (policy-chosen) backend fails to get us a connection,
retry a random backend (still according to their weight) until
retries are exhausted.

Kristian sent a proof of concept patch, I just cleaned it up and made
it compile.

Thanks to:	Kristian

Fixes	#977

32 bit systems.

Spotted by:	Kristian

didn't get it rigth the first time.
Thanks to scoof for pointing it out.

Explained the semantics quickly so people understand why not all objects survive a crash

response code stuff and fully incorporate the fact that they are both
16 unsigned now.

No functional changes.

Ironically, this does NOT fix #971 (see if you can handle this, trac).
(WIP)

the silo into VM.  If this fails or we get garbage, the silo will
be cleared.

Fixes	#962

expect:

Clamp rather than overflow on child indexes when we get to the
end of the UINT_MAX items we can support.

Found by adding a lot of asserts and brute force testing, both
of which I have left in.

Fixes       #967

May also be relevant to #827

end of the UINT_MAX items we can support.

Found by adding a lot of asserts and brute force testing, both
of which I have left in.

Fixes 	#967

May also be relevant to #827

also have the 206/range handling.

Instead of building the 304 response from scratch, dumb down the
200 response accordingly.

This implement the policy consideration of #970 led to.

Written by:	Martin

prefer IMS, it is less work and less data to transmit.

Fixes	#972

Thanks to:	Martin

into the RFC policy module where it belongs.

Put esi → do_esi in upgrade checklist, fix markup typo.

Fixes #974

Document the TTL record.

Simplify the move from sp->wrk to sp->obj accordingly.

Add a diagram that explains how ttl, grace & keep related to
each other.

Fix VCL's obj.ttl variable to appear to be relative to "now" rather
than obj->entered. (#956)

Also log SLT_TTL when we change obj.grace and obj.keep

Make SLT_TTL always have the same format:
	XID
	"RFC" or "VCL"
	obj.ttl
	obj.grace
	obj.keep
	obj.entered
	obj.age
In addition "RFC" has:
	obj.date
	obj.expires
	obj.max-age

Fixes	#956

Thanks to:	DocWilco