Log Message:
Update rp-pppoe to 3.8: various internal changes, some of them bogus
and reverted by patches, some of them were already present in (now
removed) patches; plus:

- Changed the names of commands from adsl-* to pppoe-* to more logically
  name the scripts.

- Make the userland pppoe daemon run as "nobody" if possible, once session
  has started.

- Make userland pppoe program somewhat safe if it is installed SUID or
  SGID.  Note that I still do *NOT* recommend a SUID/SGID pppoe.

- Fix long-standing bug in pppoe-server that passed arguments to pppd in the
  wrong order.