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With level-triggered epoll, this should take care of the cpu-spinning that
we saw in #644, but needs to be confirmed.


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but does handle the -S authentication for you.

You can now get a secure remote CLI connection by:

	ssh foohost varnisadm -T :8081 -S/etc/varnish_secret

Or you can:

	echo "help" | ssh foohost varnisadm -T :8081 -S/etc/varnish_secret



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the #define is correct.



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from the CLI.

Put in a separate source file, as it should be included in libvarnishapi
as well.



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Use VSS_open() instead of home-rolling.



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compile time constant on all systems.

Pick it up with sysconf() instead.



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these functions.

The [v]asprintf() functions are convenient shorthand, but suffer from
a number of problems, portability, cornercases and performance being
the most relevant to Varnish. 

Static buffers on the stack (see [v]bprintf macros, or sbufs (vsb)
are always better choices for us.



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new sessions as such.  If we get no request in the session_linger
window, we punt the session over to the waiter, in order to not
tie up a worker thread longer than necessary.

This makes the session_linger a more important paramter to tune/get
right, but should also reduce our vulnerability to certain DoS attacks.



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to the client absconding the TCP connection.

This comes to the fore on Solaris, where not only systemcalls which
push data through sockets (read,write,select...) return these errors,
but also socket-state calls (setsockopt, ioctl, fcntl) do.

Root cause of trouble in #626 & al.



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and working, and panic with a somewhat usable message if not.

PS: And boy, are you screwed if my test sneaks though a kernel bug...



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the features listed on the present platform



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Don't update the pollfd state from the pipe, until we have dealt with
all sessions.

Strongly assert the pollfd state everywhere.



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spurious test-failures if peoples DNS servers lie to them.

Fixes #356



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