return from ssl_callback_LogTracingState if sc->nLogLevel < SSL_LOG_INFO

else there are 5 (expensive!) calls made to ssl_var_lookup on every request
for info that will never be logged
PR:
Obtained from:
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git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92119 13f79535-47bb-0310-9956-ffa450edef68