Make re-exec work with "dropbearmulti dropbear" The re-exec needs to know to use the dropbearmulti binary instead. Add a test for this case.

#include "fuzz.h"

int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
	return fuzz_run_server(Data, Size, 0, 0);
}