Package samba-common: Information

- Update to maintenance release of Samba 4.15 with latest bugfixes:
  + Setting fruit:resource = stream in vfs_fruit causes a panic (Samba#15099).
  + Fix logging dsdb audit to specific files (Samba#15076).
  + Fix vfs_gpfs with vfs_shadowcopy2 fail to restore file if original file had
    been deleted (Samba#15069).
  + Remove netgroups support (Samba#15087).
  + Fix smbclient commands del & deltree fail with
    NT_STATUS_OBJECT_PATH_NOT_FOUND with DFS (Samba#15100).
  + Fix out-by-4 error in smbd read reply max_send clamp (Samba#14443).
  + s3:libads: Check if we have a valid sockaddr (Samba#15106).
  + smbd: Make non_widelink_open() robust for non-cwd dirfsp (Samba#15105).

- Add samba-krb5-printing with CUPS backend for printing with Kerberos support.
- Fix samba-tool domain backup DC with forced local samdb.

- samba-dc: Replace internal helper program performing asynchronous
  printing-related jobs (samba-bgqd) to internal package directory.