(do_reaper_callback): Moved the waitpid() logic into a callback,
that is used as an lsh signal handler.
(reaper_install_handler): New function.
(make_reaper): Install lsh signal handler (by calling
reaper_install_handler).
(reaper_run): Obsoleted, #if:ed out.

Rev: src/reaper.c:1.15
Rev: src/reaper.h:1.8