rd_glue
return rd_glue(cur, new, i, head);
return rd_glue(cur, new, i, head);
return rd_glue(cur, new, lim, head);
return rd_glue(cur, new, i, head);
return rd_glue(cur, new, lim, head);
int rd_glue(struct radish *, struct radish *, int, struct radish_head *);