The idea is to be able to have our apps load engine keys using a URI:
org.openssl.engine:{engineid}:{keyid}
This is legacy, but added for the time being to support keys given to
the application like this:
-engine {engineid} -key {keyid} -keyform ENGINE
This latter form is recognised internally, and rewritten into the URI
form.
Reviewed-by: David von Oheimb <david.von.oheimb@siemens.com>
(Merged from https://github.com/openssl/openssl/pull/13570)
