removed password len restrictions from pbkdf2_hmac_sha*.h files
improved speed of scrypt, about 2x
Merge branch 'bleeding-jumbo' into memdbg

* bleeding-jumbo:
  improved speed of scrypt, about 2x
  removed password len restrictions from pbkdf2_hmac_sha*.h files

Conflicts:
	src/crypto_scrypt-ref_plug.c