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Kerrighed rc for XtreemOS

A Kerriged 3.0 release candidate is available at
http://gforge.inria.fr/frs/download.php/27027/kerrighed-3.0rc1.tar.gz

Changes are the following:
   * [kernel] Port to linux 2.6.30
   Features:
   Checkpoint/restart
   * Add various options to checkpoint and restart
   * Add tools ipccheckpoint and ipcrestart to help checkpoint/restart of applications using IPC objects
   Kerrighed containerization
   * [kernel] Run Kerrighed in a Linux container
   * New tools krgboot[_helper] and krginit[_helper] to run Kerrighed in a Linux container
   * Fully automatic cluster boot
   Kerrighed hotplug
   * [kernel] Experimental support for adding nodes to a live cluster
   * New krgadm semantics:
     * kill commands 'cluster start' and 'wait_start',
     * make command 'nodes add' the default way to build a cluster

   Fixes:
   * [kernel] Support migration of X connections
   * [kernel] Many bugfixes in socket migration
   * [kernel] Support migration / remote fork of chrooted applications
   * [kernel] Many migration fixes
   * Remove limitation on number of concurrent executions in KTP

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