DOCS: Move implementation specific docs away from provider-digest(7)

The provider- manuals are meant to describe the general interface for
their respective operation.  This is not the place to describe
implementation specific details.

This change creates a number of doc/man7/EVP_MD manuals, one for each
algorithm or set of algorithms, as well as doc/man7/EVP_MD-common.pod
to describe what's common to them all.

While we're at it, correct the SHA3 settable context params array to
match what's actually settable.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/11270)

1 files changed, 34 insertions, 0 deletions

diff --git a/doc/man7/EVP_MD-MD2.pod b/doc/man7/EVP_MD-MD2.pod
new file mode 100644
index 0000000000..61fc42fc4d
--- /dev/null
+++ b/doc/man7/EVP_MD-MD2.pod
@@ -0,0 +1,34 @@
+=pod
+
+=head1 NAME
+
+EVP_MD-MD2 - The MD2 EVP_MD implementation
+
+=head1 DESCRIPTION
+
+Support for computing MD2 digests through the B<EVP_MD> API.
+
+=head2 Identity
+
+This implementation is only available with the legacy provider, and is
+identified with the name "MD2".
+
+=head2 Gettable Parameters
+
+This implementation supports the common gettable parameters described
+in L<EVP_MD-common(7)>.
+
+=head1 SEE ALSO
+
+L<provider-digest(7)>, L<OSSL_PROVIDER-default(7)>
+
+=head1 COPYRIGHT
+
+Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
+
+Licensed under the Apache License 2.0 (the "License").  You may not use
+this file except in compliance with the License.  You can obtain a copy
+in the file LICENSE in the source distribution or at
+L<https://www.openssl.org/source/license.html>.
+
+=cut