Make explicit in the documentation that -n causes all log output to go
to stderr. Provide an option that is _really_ just "don't fork()" for
people who want to run secnet from init.
+
+
+--
+This file is part of secnet.
+See LICENCE and CREDITS for full list of copyright holders.
+SPDX-License-Identifier: GPL-3.0-or-later
+There is NO WARRANTY.