New openssl subject parser hard to debug

-subj 'subject=C = US, ST = A, L = root, O = Hewlett Packard Enterprise Company, OU = Remote Device Access, CN = Hewlett Packard Enterprise Remote Device Access Test Local CA, emailAddress = rda@hpe.com'
was a valid subject in openssl 1.0. Error received in 1.1 is:

problems making Certificate Request

Not very informative, I only figured this out because I compiled the
code and added logging.

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/7098)

(cherry picked from commit 2167640b)