CVE-2020-25718 s4-rpc_server: Change sid list functions to operate on a array of...

CVE-2020-25718 s4-rpc_server: Change sid list functions to operate on a array of struct dom_sid

This is instead of an array of struct dom_sid *.

The reason is that auth_user_info_dc has an array of struct dom_sid
(the user token) and for checking if an RODC should be allowed
to print a particular ticket, we want to reuse that a rather
then reconstruct it via tokenGroups.

This also avoids a lot of memory allocation.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14558

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>