Merge r1933908 from trunk:
mod_ssl: Expose serialNumber (2.5.4.5) as standard env var from certificate DN
serialNumber (2.5.4.5) is a standard LDAP attribute embedded in the subject's
and/or issuer's DN, extract it by standard means from the DN and expose
via StdEnvVars.
PR: 35154
Co-authored-by: Michael Osipov <michaelo@apache.org>
Submitted by: Benjamin Demarteau <benjamin.demarteau@liege.be>
Reviewed By: michaelo, jorton, rpluem
Github: closes #644
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@
1934900 13f79535-47bb-0310-9956-
ffa450edef68