CVE-2014-8143:dsdb-samldb: Check for extended access rights before we allow changes to userAccountControl

This requires an additional control to be used in the
LSA server to add domain trust account objects.

Bug: https://bugzilla.samba.org/show_bug.cgi?id=10993

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Stefan Metzmacher <metze@samba.org>

Autobuild-User(master): Karolin Seeger <kseeger@samba.org>
Autobuild-Date(master): Thu Jan 15 14:54:47 CET 2015 on sn-devel-104
