6899006 Remove .byte asm directives and use new Intel Westmere opcodes 6647055 x86_64 MD5/SHA1 assembly source should use 32-bit registers when the assembler supports it

6652716 Need an ARCFOUR implementation optimized for Intel EM64T 6658907 digest(1) and mac(1) could benefit from being 64-bit programs 6665607 Need a SHA256/SHA384/SHA512 implementation optimized for 64-bit x86 --HG-- rename : usr/src/common/crypto/arcfour/amd64/arcfour_crypt_amd64.s => deleted_files/usr/src/common/crypto/arcfour/amd64/arcfour_crypt_amd64.s