Tue May 15 19:23:15 CEST 2007

copy method

maybe it's a nice moment to take out the packet copy method, since
it's not really used anywhere.. at least i think so.

oops. can't take it out. 'reserve' uses it. so i'm going to change the
default to non-copyable, unless there is a copy method, and add a copy
method to the packets that need one.