sha512 (unix) in oclhashcat-plus

[atom]

the worst problem with sha512 is the lacking support for true 64 bit integers. sha512crypt is even more worse, since it is doing both, lots of iterations and generating huge datablock that need transformation. i dont expect sha512crypt being much faster on gpu than on cpu. maybe x 2 or x 3 at best. i think we have to wait for better 64 bit int support on gpus.