LXC 1.0 needs an additional line in the lxc.conf.

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di untagging was broken due to errors on the implementation of the vm expiration feature; fixes #1657

git-svn-id: https://svn.qindel.com/repos/main/projects/qindel/QVD/src/trunk@25263 4046b530-fbad-4e16-af16-ee11f0b55167
import Changelog from branch 3.5

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