[mod_openssl] fix build warnings on MacOS X
need undef OPENSSL_NO_STDIO for a few funcs which access filesystem
#include <unistd.h>
/*(not needed)*/
-#define OPENSSL_NO_STDIO
+/* correction; needed for:
+ * SSL_load_client_CA_file()
+ * X509_STORE_load_locations()
+ */
+/*#define OPENSSL_NO_STDIO*/
#ifndef USE_OPENSSL_KERBEROS
#ifndef OPENSSL_NO_KRB5
