Log Message:
net/samba4: update to 4.13.15

This release contain security fixes.

                   ===============================
                   Release Notes for Samba 4.13.15
                          December 15, 2021
                   ===============================

This is the latest stable release of the Samba 4.13 release series.

Important Notes
===============

There have been a few regressions in the security release 4.13.14:

o CVE-2020-25717: A user on the domain can become root on domain members.
                  https://www.samba.org/samba/security/CVE-2020-25717.html
                  PLEASE [RE-]READ!
                  The instructions have been updated and some workarounds
                  initially adviced for 4.13.14 are no longer required and
                  should be reverted in most cases.

o BUG-14902: User with multiple spaces (eg Fred<space><space>Nurk) become
             un-deletable. While this release should fix this bug, it is
             adviced to have a look at the bug report for more detailed
             information, see https://bugzilla.samba.org/show_bug.cgi?id=14902.

Changes since 4.13.14
---------------------

o  Andrew Bartlett <abartlet@samba.org>
   * BUG 14656: Spaces incorrectly collapsed in ldb attributes.
   * BUG 14901: The CVE-2020-25717 username map [script] advice has undesired
     side effects for the local nt token.
   * BUG 14902: User with multiple spaces (eg \ 
Fred<space><space>Nurk) become un-
     deletable.

o  Ralph Boehme <slow@samba.org>
   * BUG 14922: Kerberos authentication on standalone server in MIT realm
     broken.

o  Alexander Bokovoy <ab@samba.org>
   * BUG 14903: Support for ROLE_IPA_DC is incomplete.

o  Stefan Metzmacher <metze@samba.org>
   * BUG 14899: winbindd doesn't start when "allow trusted domains" is off.
   * BUG 14901: The CVE-2020-25717 username map [script] advice has undesired
     side effects for the local nt token.

o  Joseph Sutton <josephsutton@catalyst.net.nz>
   * BUG 14901: The CVE-2020-25717 username map [script] advice has undesired
     side effects for the local nt token.