SubjectX500PrincipalExtractor now returns the left-most, most-specific
matching RDN value, matching both convention and
SubjectDnX509PrincipalExtractor. Since LdapName#getRdns lists RDNs
most-significant first, the extractor reads them in reverse so that a
subject with more than one matching attribute (e.g. two CNs) resolves to
the most specific value.
Closes gh-19254
Signed-off-by: Josh Cummings <3627351+jzheaux@users.noreply.github.com>
Josh Cummings
7fc97c6ee2