r4356:
Don't halfclose the backend polling TCP connection after sending the
request, some backends gets confused by this.

Add a ".status" to backend polling, to configure the expected HTTP
status code for a good poll.

Fixes #584

r4357:
.expected_response is a better idea than .status

Tip o' the hat to: tfheen



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Fixes #559



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Fixes #585


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Previously, running varnishd -V would sometimes say:

nm: 'varnishd': No such file

which is wrong.  Silence this message



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This bit got missing when we merged the new epoll acceptor for 2.0.

Disable SO_LINGER when we time out a connection due to sess_timeout,
so that we do not RST connections that have still not transmitted
their data.

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srcaddr_{ttl,hash} was never really used for anything, so turn it off
to gain a small bit of performance.  It is gone in trunk, so no
corresponding change there we can merge.

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Do the simple part of ban list lurker: link the objcores off the bans
the reference.



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If we cannot even make sense of the request, don't bother with
attempting a reply.

Fixes #561


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Submitted by:   "Jos I. Boumans" <jos@dwim.org>



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If we come into vcl_error{} with a non-3-digit error status, for
instance because vcl_recv does "return(error);", force the status to
501.

Fixes: #558


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Add a family of 9 counters to tell us how fetching from the backends
progress.



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Fixes #549



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r4219:
Expose the good string backslash implementation from argv.c and
replace a half-baked one in vtc.c with it.

r4220:
Add a newline to feed the new backslash handler



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it was possible to have infinite recursion between vcl_error returning
restart and cnt_recv calling vcl_error when you had too many restarts



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Don't explode manager if it gets overwritten.



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r4184:
An explanatory comment.

r4185:
Add a ".initial" property to backend probe specifications.

This is the number of good probes we pretend to have already seen when
we start up, in order to speed up getting healthy backends.

The default value is one less than the .threshold, so the backend
will be set healthy if it manages to respond correctly to the very 
first probe we send to it.

(A bit of this commit leaked in during r4184)


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Add a complementary vsb_unquote() function.



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varnishtop used to have a hard-coded max record length of 255 bytes.
This broke with the change that allows larger record length.  Use a
dynamic buffer instead.



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AIX has a "struct thread" in pthread.h, which conflicts with our
struct thread.  Rename ours to replay_thread.

Fixes #531

Thanks to demik for patch


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