db_delete_link
error = db_delete_link(fhpath, dfh,
error = db_delete_link(fhpath, from_dfh, from_name);
error = db_delete_link(fhpath, &public_fh, str);
return (db_delete_link(fhpath, dfh, name));
int db_delete_link(char *fhpath, fhandle_t *dfh, char *name);