TODO items:

- kill -USR1 should not reconnect but just refresh with pinging
- mac=xxxxx config directive, to allow windows etc.
- on shell xyz
- add a general vpn introduction to the manual
- reformat the texinfo manual to look less manpagish
- use gnutls instead of openssl

- vped <no nodename> => starts without error message but fails to connect
- should tets own hostkey for validity
- re-bind() on HUP
- Feb 26 18:48:31 (none) modprobe: modprobe: Can't locate module  (^E^H(