Polishing touch

[arno at heho.snv.jussieu.fr]

> here what is (probably) going on. when system starts up you have
> no "tap0" interface. ifconfig(8) can not find "tap0" interface and
hmmm, dunno, long before ifconfig I get :

  tap0: bpf attached

> now the thing about tap(4) (and tun(4)) interfaces is that they are
> *virtual*, i.e. in order to create interface one need to open 
> corresponding character device first, i.e. /dev/tapX (or /dev/tunX). 

yip; NB, I think we should concentrate on tun0 anyway, since 
"device tun" is in GENERIC, whilst tap0 is a hack of mine ...

Arno