* tools/gpgconf.c (oStatusFD): New const.
(opts): New option --status-fd.
(statusfp): New var.
(set_status_fd): New.
(gpgconf_write_status): New.
(gpgconf_failure): New.
(main): Set status fd and replace exit by gpgconf_failure.
* tools/gpgconf-comp.c: Repalce exit by gpgconf_failure.
(gc_process_gpgconf_conf): Print a few warning status messages.