(get_dcname): Remove.
(current_group): Remove.
(enum_unix_groups): Simplify. Change space to underscore in domain
name.
(enum_local_groups): Simplify to accommodate the fact that it's only
called for foreign machines.
(enum_groups): Ditto.
(print_special_by_sid): Remove.
(print_special_by_name): Remove.
(usage): Align to new code.
(fetch_primary_domain): Remove.
(main): Use cygwin_internal CW_SETENT, CW_GETENT and CW_ENDENT method.
Call enum_local_groups, enum_groups, and enum_unix_groups only for
foreign machines.
* mkpasswd.c (get_dcname): Remove.
(current_user): Remove.
(enum_unix_users): Simplify. Change space to underscore in domain name.
(enum_users): Simplify to accommodate the fact that it's only
called for foreign machines.
(print_special_by_sid): Remove.
(usage): Align to new code.
(longopts): Add -b/--no-builtin option.
(opts): Add -b option.
(print_special_by_name): Remove.
(enum_std_accounts): Remove.
(fetch_primary_domain): Remove.
(main): Use cygwin_internal CW_SETENT, CW_GETENT and CW_ENDENT method.
Call enum_users and enum_unix_users only for foreign machines.
* utils.xml (mkgroup): Align documentation to new usage.
(mkpasswd): Ditto.