variable.
* nis/nss-nis.h: Define response_t and intern_t. Declare _nis_saveit.
* nis/nss_nis/nis-pwd.c: Remove response_t and intern_t definition.
(saveit): Renamed to _nis_saveit. Take parameter which is pointer
to the intern_t object. Change all users.
* nis/nss_nis/nis-grp.c: Remove response_t, intern_t, and saveit
definition. Use _nis_saveit instead of saveit.
* nis/nss_nis/nis-service.c: Likewise.
* nis/nss_nis/nis-initgroups.c: Likewise.
(internal_setgrent): Adjust for buffer handling.
(internal_getgrent_r): Likewise.
* nis/nss_nis/nis-rpc.c: Likewise.