If workspace_thread is not be big enough to hold all the objcore pointers that need to be purged we iterate until done.
If workspace_thread is not be big enough to hold all the objcore pointers
that need to be purged we iterate until done.

Fixes #1551

gquintard/Varnish-Cache,alarky/varnish-cache-doc-ja,varnish/Varnish-Cache,varnish/Varnish-Cache,zhoualbeart/Varnish-Cache,gauthier-delacroix/Varnish-Cache,ajasty-cavium/Varnish-Cache,chrismoulton/Varnish-Cache,alarky/varnish-cache-doc-ja,franciscovg/Varnish-Cache,zhoualbeart/Varnish-Cache,gquintard/Varnish-Cache,ajasty-cavium/Varnish-Cache,chrismoulton/Varnish-Cache,feld/Varnish-Cache,ajasty-cavium/Varnish-Cache,alarky/varnish-cache-doc-ja,mrhmouse/Varnish-Cache,mrhmouse/Varnish-Cache,gquintard/Varnish-Cache,zhoualbeart/Varnish-Cache,chrismoulton/Varnish-Cache,gquintard/Varnish-Cache,franciscovg/Varnish-Cache,feld/Varnish-Cache,gauthier-delacroix/Varnish-Cache,franciscovg/Varnish-Cache,mrhmouse/Varnish-Cache,alarky/varnish-cache-doc-ja,zhoualbeart/Varnish-Cache,ajasty-cavium/Varnish-Cache,alarky/varnish-cache-doc-ja,mrhmouse/Varnish-Cache,feld/Varnish-Cache,varnish/Varnish-Cache,gauthier-delacroix/Varnish-Cache,mrhmouse/Varnish-Cache,chrismoulton/Varnish-Cache,ajasty-cavium/Varnish-Cache,feld/Varnish-Cache,zhoualbeart/Varnish-Cache,franciscovg/Varnish-Cache,varnish/Varnish-Cache,varnish/Varnish-Cache,franciscovg/Varnish-Cache,chrismoulton/Varnish-Cache,feld/Varnish-Cache,gauthier-delacroix/Varnish-Cache,gauthier-delacroix/Varnish-Cache