Correct test for enable_cdda to accept either curses.h *or* ncurses.h

Add <strings.h> in more places that use bzero. Checks suggested by Blake Jones.

Add preprocessor symbol CDIO_CONFIG_H to <cdio_config.h>

lib/driver/cdtext.c

@@ -32,6 +32,9 @@
 #ifdef HAVE_STRING_H
 #include <string.h>
 #endif
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 #include <stdio.h>