path, or a path relative to $localstatedir/varnish.  By default, it is set
to the host name, which results in $localstatedir/varnish/$hostname.

This logic is centralized in instance.c, which is compiled into both
varnishd and libvarnishapi, with prototypes in varnishapi.h and heritage.h.


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accordingly.



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We need to process -P and -f arguments before we change directory.
(ticket 120)

(XXX: what about storage and hash arguments ??)

The daemon(3) call should not change our directory subsequently.
(ticket 121)
 
There is no need to enforce a hostname style format on the argument,
a directory nam makes much more sense, since that is what we need. 
Defaulting to /tmp instead of our hostname makes more sense (ticket 119).

This also allows the admin to use a different directory if /tmp is
mounted noexec (ticket 111) 
 
Put the directoryname used in the proctitle (via heritage)
 
XXX: for docs: vcl.load CLI commands will work relative to the -n directory.



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is already open.  The filedescriptor will be closed.



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up: implement a "sloppy" LRU list.  An object is placed on the list (or moved
to the head of the list if it's already on it and hasn't moved recently) by
calling LRU_Enter(), and removed by calling LRU_Remove().  LRU_DiscardSpace()
will iterate through the LRU list, starting at the back, and retire objects
(by adding them to the deathrow list) until the sum of the length of the
retired objects reaches a certain number.  Similarly, LRU_DiscardTime() will
retire objects which haven't moved since a specified cutoff date.  In both
cases, vcl_discard() will be given a chance to inspect the object and veto
its retirement.

Currently, LRU_Enter() and LRU_Remove() are called from HSH_Lookup() and
HSH_Deref() respectively.  There may be better alternatives.

Neither LRU_DiscardSpace() nor LRU_DiscardTime() is currently called from
anywhere.  There are a number of issues to consider: for instance, even if
LRU_DiscardSpace() is called when a high-water mark is reached, there is
still a possibility that the cache might fill up before it has had a chance
to finish and the hangman has had a chance to process the deathrow list.


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are not on the expiry heap.


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allocated and free space.


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object is acceptable to all clients.


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Visible from vcl_fetch() only.



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This can happen if you get an IPv6 address for the -a argument, but
runs without IPv6 enabled in your kernel.  Typically happens only
for localhost.



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Remove bogus "has_string" variable marking, it can be derived from the type.

Make obj.* variables valid in vcl_timeout() and vcl_discard()



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their scope.  One example of this is the "req.hash" variable which only
exists in the vcl_hash method.



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when -C is specified, this makes it easier to do completeness test on the
VRT interface.


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This is for DES' work on LRU list.



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