Macros have been added to generate the simple legacy methods.
Engines and EVP_MD_METH_get methods still require access to the old legacy methods,
so they needed to be added back in.
They may only be removed after engines are deprecated and removed.
Removed some unnecessary #includes and #ifndef guards (which are done in build.info instead).
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10602)
This leaves minimal implementations of EVP_md2, EVP_md4, EVP_md5 and
EVP_mdc2, that are now only there to provide a name for implicit fetches.
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10164)
