VServer Context Quota

Some minor cleanups where made, and a possible race in vfs_unlink() was removed. The patch was updated to match vs1.27 and recent 2.4 kernels.

Some minor issues with moving files from one quota hash to
the other where fixed. Patches were adapted to the latest
quota changes, and the Disk Limit patches where included.

A new mount option was added (tagxid), a bug in the
quota list transfer was fixed, and a new dqhash transfer
check was added. All patches where updated to match
the latest vserver development release.

This release includes clean-ups to context 0 migration, quota debug code (kernel option), new capabilities (QUOTACTL and CHCTX), and the vroot device and the new v2 quota patch have been incorporated.

This version of the quota-tools improves support for the context-specific aspects of quota management, adds the new context quota type, and enhanced the user/group display of repquota to include context information.