• minor optimizations and code cleanup
  -- improved maintainability by reducing #ifdef's
  -- sha1 transform code now easier to follow
  
• streamlined shadump/shaload file format
  -- eliminated special "HQ" entry
  -- state now held in "H" for all transforms
  -- supplied "fixdump" utility to convert old format
  
• SHA-384/512 functions now return NULL for no 64-bit operations
  -- previously they were undefined
  -- no longer necessary to use eval's to test for presence