CORE: Register all legacy "names" when generating the initial namemap

CORE: Register all legacy "names" when generating the initial namemap

When generating the initial namemap from EVP cipher and digest names,
we din't do it quite as thoroughly as necessary, which meant that so
called "long names" weren't necessarily registered, and if anyone ever
tried to check the algorithm of an EVP_CIPHER or EVP_MD using a so
called "long name" would fail.

This doesn't deal with the fact that "long names" have a distinct role
as human readable descriptors, useful for printouts.  Further changes
are necessary to deal with this.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14498)