yp_maplist
__weak_alias(yp_maplist,_yp_maplist);
int yp_maplist (const char *, struct ypmaplist **);
__weak_alias(yp_maplist,_yp_maplist)
yp_maplist( const char *indomain, struct ypmaplist **outmaplist)
switch (yp_maplist(Domain, &ypml)) {