Portability fixes:
* Fix <sys/fcntl.h> in client/adnsresfilter.c to <fcntl.h>.
- * #include <sys/types.h> and <unistd.h> for fcntl in */*.c.
+ * Add missing <sys/types.h>, <unistd.h>, <time.h>, <sys/time.h>.
* Cope with compilers that don't do `inline'.
* Do not use variadic macro, use stdarg instead (adnslogres.c).
* #include "config.h" before "adns.h".