Package samba-libs: Information

- Update to stable release of Samba 4.19
- Fixes from upstream:
  + Windows 2016 fails to restore previous version of a file from a shadow_copy2
    snapshot (Samba#13688).
  + smbd fixes (Samba#12421, Samba#15550).
  + samba-gpupdate fixes (Samba#15548, Samba#15557, Samba#15552, Samba#15558).
  + smbpasswd reset permissions only if not 0600 (Samba#15555).

- NMU: remove useless symlinks to nss_winbind and nss_wins.
  See also: https://altlinux.org/Usrmerge.

- Update to stable release of Samba 4.19
- Fixes from upstream:
  + net changesecretpw cannot set the machine account password if secrets.tdb
    is empty (Samba#13577).
  + Following intermediate abolute share-local symlinks is broken (Samba#15505).
    ctdb RELEASE_IP causes a crash in release_ip if a connection to a non-public
    address disconnects first (Samba#15523).
  + shadow_copy2 broken when current fileset's directories are removed (Samba#15544).
  + 'force user = localunixuser' doesn't work if 'allow trusted domains = no'
    is set (Samba#15469).
  + smbget: debug logging doesn't work (Samba#15525), username in the smburl and
    interactive password entry doesn't work (Samba#15532), auth function doesn't
    set values for password prompt correctly (Samba#15538).
  + Unable to copy and write files from clients to Ceph cluster via SMB Linux
    gateway with Ceph VFS module (Samba#15440).
  + Multichannel refresh network information (Samba#15547).