This allows you to include one config file inside another. The file is included literally, as though typed
in place.
It takes the standard substitutions, except %u,
%P and %S.
Since Samba version 3.0.26, setting
registry has
a special meaning: It does not include
a file named registry from the current working
directory, but instead reads the global configuration options
from the registry. See the section on registry-based
configuration for details. Note that this option
automatically activates registry shares.
/usr/local/samba/lib/admin_smb.conf