Cleanup unused includes from ctl.c since we're not using sockets.
#include <limits.h>
#include <stdlib.h>
#include <string.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/ioctl.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
#include "circbuf.h"
#include "cfgutils.h"
#include "ctl.h"
#include "dbg.h"
-#include "fn.h"
struct _ctl_t
{
