The Great MIPS Profile Cleanup of 2006:

The Great MIPS Profile Cleanup of 2006:
   - Remove all 2004.2 and 2005.0 Profiles -- they've been deprecated for awhile now
   - Roll in the new profile layout under 2006.1 -- profiles are divided by machines
     where needed, and further divided into ABI sub-levels under each grouping.  This
     gives us flexibility to limit things (if needed) not only by machine, but also
     by the different ABI/userland combinations possible.
   - Update the top-level use.mask and virtuals file to account for the new masking
     scheme under the 2006.1 profile layout.