r4620: - add interface functions to the auth subsystem so that callers doesn't need to

r4620: - add interface functions to the auth subsystem so that callers doesn't need to
  use function pointers anymore
- make the module init much easier
- a lot of cleanups

don't try to read the diff in auth/ better read the new files

it passes test_echo.sh and test_rpc.sh

abartlet: please fix spelling fixes

metze
(This used to be commit 3c0d16b8236451f2cfd38fc3db8ae2906106d847)