Log Message:
samba4: updated to 4.19.4

Changes since 4.19.3
* BUG 13577: net changesecretpw cannot set the machine account password if
  secrets.tdb is empty.
* BUG 15540: For generating doc, take, if defined, env XML_CATALOG_FILES.
* BUG 15541: Trivial C typo in nsswitch/winbind_nss_netbsd.c.
* BUG 15542: vfs_linux_xfs is incorrectly named.
* BUG 15377: systemd stumbled over copyright-message at smbd startup.
* BUG 15505: Following intermediate abolute share-local symlinks is broken.
* BUG 15523: ctdb RELEASE_IP causes a crash in release_ip if a connection to
  a non-public address disconnects first.
* BUG 15544: shadow_copy2 broken when current fileset's directories are
  removed.
* BUG 15377: systemd stumbled over copyright-message at smbd startup.
* BUG 15523: ctdb RELEASE_IP causes a crash in release_ip if a connection to
  a non-public address disconnects first.
* BUG 15534: smbd does not detect ctdb public ipv6 addresses for multichannel
  exclusion.
* BUG 15469: 'force user = localunixuser' doesn't work if 'allow trusted
  domains = no' is set.
* BUG 15525: smbget debug logging doesn't work.
* BUG 15532: smget: username in the smburl and interactive password entry
  doesn't work.
* BUG 15538: smbget auth function doesn't set values for password prompt
  correctly.
* BUG 15523: ctdb RELEASE_IP causes a crash in release_ip if a connection to
  a non-public address disconnects first.
* BUG 15440: Unable to copy and write files from clients to Ceph cluster via
  SMB Linux gateway with Ceph VFS module.
* BUG 15547: Multichannel refresh network information.