* dbus/dbus-auth.c (handle_server_data_external_mech): args to
dbus_credentials_match were backward
* dbus/dbus-auth-script.c (_dbus_auth_script_run): support
NO_CREDENTIALS and ROOT_CREDENTIALS
* dbus/dbus-auth.c (_dbus_auth_do_work): move get_state() routine
into here. Never process more commands after we've reached an
end state; store further data as unused bytes.
* test/data/auth/*: add more auth tests
* dbus/dbus-auth-script.c (_dbus_auth_script_run): support EXPECT
command to match exact string and EXPECT_UNUSED to match unused
bytes
* test/Makefile.am (dist-hook): fix to dist all the test stuff
