Handle that the sessions may be killed the worker thread before we get around to delete the kevent.
Handle that the sessions may be killed the worker thread before
we get around to delete the kevent.



git-svn-id: 2c9807fa3ff65b17195bd55dc8a6c4261e10127b@2268 d4fa192b-c00b-0410-8231-f00ffab90ce4

drwilco/varnish-cache-drwilco,ajasty-cavium/Varnish-Cache,mrhmouse/Varnish-Cache,franciscovg/Varnish-Cache,mrhmouse/Varnish-Cache,feld/Varnish-Cache,ambernetas/varnish-cache,varnish/Varnish-Cache,franciscovg/Varnish-Cache,franciscovg/Varnish-Cache,gauthier-delacroix/Varnish-Cache,franciscovg/Varnish-Cache,gauthier-delacroix/Varnish-Cache,chrismoulton/Varnish-Cache,zhoualbeart/Varnish-Cache,feld/Varnish-Cache,drwilco/varnish-cache-drwilco,ajasty-cavium/Varnish-Cache,drwilco/varnish-cache-drwilco,mrhmouse/Varnish-Cache,gauthier-delacroix/Varnish-Cache,mrhmouse/Varnish-Cache,feld/Varnish-Cache,gquintard/Varnish-Cache,ajasty-cavium/Varnish-Cache,chrismoulton/Varnish-Cache,wikimedia/operations-debs-varnish,ambernetas/varnish-cache,gquintard/Varnish-Cache,zhoualbeart/Varnish-Cache,varnish/Varnish-Cache,wikimedia/operations-debs-varnish,gquintard/Varnish-Cache,varnish/Varnish-Cache,alarky/varnish-cache-doc-ja,1HLtd/Varnish-Cache,gquintard/Varnish-Cache,1HLtd/Varnish-Cache,chrismoulton/Varnish-Cache,alarky/varnish-cache-doc-ja,ajasty-cavium/Varnish-Cache,zhoualbeart/Varnish-Cache,gauthier-delacroix/Varnish-Cache,zhoualbeart/Varnish-Cache,alarky/varnish-cache-doc-ja,ssm/pkg-varnish,ssm/pkg-varnish,1HLtd/Varnish-Cache,zhoualbeart/Varnish-Cache,drwilco/varnish-cache-old,ssm/pkg-varnish,varnish/Varnish-Cache,wikimedia/operations-debs-varnish,feld/Varnish-Cache,wikimedia/operations-debs-varnish,ssm/pkg-varnish,1HLtd/Varnish-Cache,drwilco/varnish-cache-old,wikimedia/operations-debs-varnish,franciscovg/Varnish-Cache,ajasty-cavium/Varnish-Cache,mrhmouse/Varnish-Cache,chrismoulton/Varnish-Cache,drwilco/varnish-cache-old,feld/Varnish-Cache,gauthier-delacroix/Varnish-Cache,alarky/varnish-cache-doc-ja,ssm/pkg-varnish,ambernetas/varnish-cache,chrismoulton/Varnish-Cache,varnish/Varnish-Cache,alarky/varnish-cache-doc-ja