release of numactl/libnuma 2.0.6

Hi members of linux-numa,

I've released our current numactl/libnuma as version 2.0.6.
The 2.0.5 release was last July.

Since then:
2.0.6-rc1
- Correct numa_max_node() use of broken numa_num_configured_nodes() (Tim Pepper)
- Use numa_max_node() not numa_num_configured_nodes() (Tim Pepper)
- Fix numa_num_configured_nodes() to match man page description (Tim Pepper)
- Clarify comment for numa_all_nodes_ptr extern (Tim Pepper)
- numactl --hardware should handle sparse node numbering (Tim Pepper)
- Maintain compatibility with 2.0.3 numa_num_thread...()'s (Cliff W.)
2.0.6-rc2
- numa_num_task_cpus()/..nodes() to return actual counts (Cliff W.)
2.0.6-rc3
- Fix numa_get_run_node_mask() to return a cpuset-aware node mask (Cliff W.)
- Add a better warning to numa_node_to_cpus()
2.0.6-rc4
- Fix numa_get_mems_allowed() to use MPOL_F_MEMS_ALLOWED (Michael Spiegel)

-Cliff