December update: broken wifi, samba and torrents

OK, Samba issue resolved by:

  1. as @fzinken recommended in the thread: Samba is not working - #25 by Fye , replace the smb.conf with new distribution version after update.
  2. partially restore the config, but cross-check with samba new manuals as options like “security = share” cause samba to crash
  3. (optional) bind only to specific interfaces to avoid mentioned wifi problem (1).
  4. re-add and re-enable cifs users with smbpasswd
  5. add “ntlm auth = yes” to smb.conf to keep old behavior

The rest (1) and (3) still broken, unfortunately.
apt-get update and dist-upgrade double-checked, nothing to update, no issue.