Patches to fix leaking busyobj

[Martin Blix Grydeland]

Find attached two patches to deal with leaking busyobj structures.

First one frees any busyobj structure attached to the worker on thread exit.

Second one deals with early deref's of objects (before HSH_Unbusy, e.g. due
to failures), returning the busyobj to the worker.

Any comments appreciated.

Regards,
Martin Blix Grydeland

-- 
Martin Blix Grydeland
Varnish Software AS
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