Merge r1666297 from trunk:

ssl_util: Fix possible crash (free => OPENSSL_free) and error path leaks when
checking the server certificate constraints (SSL_X509_getBC()).



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1673940 13f79535-47bb-0310-9956-ffa450edef68