Package samba-libs: Information

- Update to maintenance release of Samba 4.19
- Fixes from upstream (Samba#15580):
  + Packet marshalling push support missing for
     CTDB_CONTROL_TCP_CLIENT_DISCONNECTED and
     CTDB_CONTROL_TCP_CLIENT_PASSED.

- Add support 'client force dns canonicalize hostname' global parameter, enables
  client library tries to resolve canonical name. This feature allows to
  communicate via kerberos to services using CNAME records without adding SPNs.
- Fixes updated from upstream for smbd:
  + If we fail to close file_handle ensure we should reset the fd (Samba#15527).
  + simplify handling of failing fstat() after unlinking file (Samba#15527).
- Fixes updated from upstream for gpo:
  + libgpo: Do not segfault if we don't have a valid security descriptor (Samba#15599).
  + python:gp: Implement client site lookup in site_dn_for_machine() (Samba#15588).
  + librpc:idl: Make netlogon_samlogon_response public (Samba#15588).

- 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).