urldb no longer uses curl directly but it does need correct network includes

The update to remove curl usage from urldb must pull in the utility
config header instead to get inet_aton and such or compoles on some
platforms fail.

content/urldb.c

@@ -96,6 +96,7 @@
 #include <strings.h>
 #include <time.h>
 
+#include "utils/config.h"
 #include "utils/nsoption.h"
 #include "utils/log.h"
 #include "utils/corestrings.h"