(do_write_only): Now global static, not a local variable in main.
(setup_timer): Removed.  Use the one from libmisc instead.
(write_server): Handle ECONNRESET, EPIPE and end-of-file when only
	writing.
(arm_timer): Check return value of setup_timer.
(end_it): Clear abort_pending.
(main): Set abort_pending if we are about to abort.  Cancel the
	timer if the top loop returns before the abort timer fires.
	Treat ECONNRESET the same way as EPIPE.