the client cert X509_NAME_oneline() is only used if SSLFakeBasicAuth

is happening.  so avoid calling that unless needed and just stash a
pointer to the client cert for the boolean checks that the client
provided a cert.
PR:
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git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92240 13f79535-47bb-0310-9956-ffa450edef68