Version 1.7.19, 2008-11-06
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* Add HMAC_RNG, based on a design by Hugo Krawczyk
* Optimized the Turing stream cipher (about 20% faster on x86-64)
* Modify Randpool's reseeding algorithm to poll more sources
* Add a new AutoSeeded_RNG in auto_rng.h
* OpenPGP_S2K changed to take hash object instead of name
* Add automatic identification for Intel's Prescott processors

