draft-802.11s mesh in the 2.6.28 kernel

The 2.6.28 kernel, released on Dec. 25th '08, brings several nice improvements to the draft-802.11s mesh support in mac80211:

• mesh support in the ath5k driver, which supports most Atheros 802.11b/g hardware.
  
• mesh parameters can now be adjusted through nl80211 via the iw user space tool instead of using debugfs.
  
• initial work on MPP support -- this will allow Mesh Point interfaces to be bridged with other interfaces.
• several bug fixes and improvements as well as some reorganization of the code.