Submitted by: vitus@cryptocom.ru

Revert change in 1516 because it breaks Windows build. Use a modified version
of the headers from s_client.c which has used similar functionality without
any problems.

sha1_block_data_order when hashing short messages. Move OPENSSL_cleanse
to "cpuid" assembler module and gain 2x.

content.

Only use streaming when appropriate for detached data in smime utility.