6.2.0.273

Version 6.2.0.273

Note: This is a pre-release version, future versions of VDO may not support
VDO devices created with this version.
- Documented the disk space requirements implied by the --indexMem option.
- Improved checking for existing LVM physical volumes when formatting a new
  VDO volume.
- Removed read cache statistics, configuration options, and table line
  parameters.
- Fixed a bug which would cause the default logical size to be 480 KB
  smaller than it could be without causing over-provisioning.
- Limited the number of logical zones to 60.
- Added a version 2 table line which uses DM-style optional parameters.
- Added a maximum discard size table line parameter and removed the
  corresponding sysfs parameter which applied to all VDO devices.
- Fixed a vdo script bug getting the size of a partition underneath a VDO
  device which prevented such devices from growing their physical size.
- Removed extraneous man pages.