breaks if /proc/self/fd/[012] already closed

[mralusw]

... at least with -o / -e, since these log files then open as fd 0 and/or 1. Maybe daemonize should call redirect_fds() in daemon.c before anything else (not after opening -o / -e)

Also, docs seem to imply that daemonize closes all fd's before starting the daemon. The daemon itself is not supposed to close all fd's, since otherwise it loses locking. But the question is what to do before starting the daemon (or daemonize itself, since it currently doesn't close fd's >= 3 and caller has to close those manually).