* src/io.c (kill_fd): Deleted.
(io_backend): Inherit resource.
(do_kill_io_backend): New function.
(make_io_backend): Call resource_init.
(io_final): New function.
(init_file): New argument LABEL.
(make_lsh_fd): New rgument LABEL. Updated callers.
(close_fd): Display label.
(io_iter): Display label.

Rev: src/io.c:1.132
Rev: src/io.h:1.76