Use a bitmap to check if we own a given file handle, before we do anything about the associated session.
Use a bitmap to check if we own a given file handle, before we
do anything about the associated session.

May be relevant relative to: #162

(Bitmap functions slightly general, for possible later reuse)



git-svn-id: 7d4b18ab7d176792635d6a7a77dd8cbbea8e8daa@2267 d4fa192b-c00b-0410-8231-f00ffab90ce4

wikimedia/operations-debs-varnish,ssm/pkg-varnish,wikimedia/operations-debs-varnish,CartoDB/Varnish-Cache,ssm/pkg-varnish,CartoDB/Varnish-Cache,ssm/pkg-varnish,wikimedia/operations-debs-varnish,wikimedia/operations-debs-varnish,ssm/pkg-varnish,wikimedia/operations-debs-varnish,CartoDB/Varnish-Cache,ssm/pkg-varnish