Update the SHA* documentation Updates to include SHA224, SHA256, SHA384 and SHA512. In particular note the restriction on setting md to NULL with regards to thread safety.
Update the SHA* documentation
Updates to include SHA224, SHA256, SHA384 and SHA512. In particular note
the restriction on setting md to NULL with regards to thread safety.

Reviewed-by: Tim Hudson <eb0be8e447f673b41b10eda09d63cd72526b0a42@openssl.org>

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl