Deprecate separate images for rlimits, itimers and posix-timers

Out-of-core rlims and timers existed before 1.3, so people trying
to restore from images generated of this old CRIU would have to
upgrade.
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/cr-restore.c

@@ -2054,6 +2054,9 @@ static int prepare_itimers_from_fd(int pid, struct task_restore_args *args)
 	struct cr_img *img;
 	ItimerEntry *ie;
 
+	if (!deprecated_ok("Itimers"))
+		return -1;
+
 	img = open_image(CR_FD_ITIMERS, O_RSTR, pid);
 	if (!img)
 		return -1;
@@ -2176,6 +2179,9 @@ static int prepare_posix_timers_from_fd(int pid, struct task_restore_args *ta)
 	int ret = -1;
 	struct restore_posix_timer *t;
 
+	if (!deprecated_ok("Posix timers"))
+		return -1;
+
 	img = open_image(CR_FD_POSIX_TIMERS, O_RSTR, pid);
 	if (!img)
 		return -1;
@@ -2362,6 +2368,9 @@ static int prepare_rlimits_from_fd(int pid, struct task_restore_args *ta)
 	int ret;
 	struct cr_img *img;
 
+	if (!deprecated_ok("Rlimits"))
+		return -1;
+
 	/*
 	 * Old image -- read from the file.
 	 */