net/samba4: update to 4.18.7

                  ==============================
                  Release Notes for Samba 4.18.7
                        September 27, 2023
                  ==============================

This is the latest stable release of the Samba 4.18 release series.

Changes since 4.18.6
--------------------

o  Jeremy Allison <jra@samba.org>
  * BUG 15419: Weird filename can cause assert to fail in
    openat_pathref_fsp_nosymlink().
  * BUG 15423: use-after-free in aio_del_req_from_fsp during smbd shutdown
    after failed IPC FSCTL_PIPE_TRANSCEIVE.
  * BUG 15432: TREE_CONNECT without SETUP causes smbd to use uninitialized
    pointer.

o  Andrew Bartlett <abartlet@samba.org>
  * BUG 15401: Avoid infinite loop in initial user sync with Azure AD Connect.
  * BUG 15407: Samba replication logs show (null) DN.

o  Ralph Boehme <slow@samba.org>
  * BUG 15463: macOS mdfind returns only 50 results.

o  Remi Collet <rcollet@redhat.com>
  * BUG 14808: smbc_getxattr() return value is incorrect.

o  Volker Lendecke <vl@samba.org>
  * BUG 15481: GETREALFILENAME_CACHE can modify incoming new filename with
    previous cache entry value.

o  Stefan Metzmacher <metze@samba.org>
  * BUG 15464: libnss_winbind causes memory corruption since samba-4.18,
    impacts sendmail, zabbix, potentially more.

o  MikeLiu <mikeliu@qnap.com>
  * BUG 15453: File doesn't show when user doesn't have permission if
    aio_pthread is loaded.

o  Martin Schwenke <mschwenke@ddn.com>
  * BUG 15451: ctdb_killtcp fails to work with --enable-pcap and libpcap ≥
    1.9.1.

o  Joseph Sutton <josephsutton@catalyst.net.nz>
  * BUG 15476: The KDC in 4.18 (and older) is not able to accept tickets with
    empty claims pac blobs (from Samba 4.19 or Windows).
  * BUG 15477: The heimdal KDC doesn't detect s4u2self correctly when fast is
    in use.

(taca)