* cygheap.cc (init_cygheap::close_ctty): Remove obsolete code.

* cygheap.cc (init_cygheap::close_ctty): Remove obsolete code.
* dcrt0.cc (child_info_spawn::handle_spawn): Signal ready after we've run
fixup_after_exec.
* dtable.cc (dtable::fixup_after_exec): Add debugging output.
* fhandler_tty.cc (fhandler_pty_master::doecho): Use class version of
to_master.
(fhandler_tty_common::close): Remove obsolete code.
(fhandler_tty_slave::fixup_after_exec): Don't close, since this is done in
dtable's fixup_after_exec.  (revisit later?)
(fhandler_pty_master::fixup_after_exec): Ditto.