Added u3r_hext() prototype to include/noun/retrieve.h.  Fixed some comments.
/* u3r_trel():
**
- ** Divide `a` as a trel `[b c]`.
+ ** Divide `a` as a trel `[b c d]`.
*/
c3_o
u3r_trel(u3_noun a,
/* u3r_qual():
**
- ** Divide (a) as a qual [b c d e f].
+ ** Divide (a) as a qual [b c d e].
*/
c3_o
u3r_qual(u3_noun a,
u3_noun* e,
u3_noun* f);
+ /* u3r_hext():
+ **
+ ** Divide (a) as a hext [b c d e f g].
+ */
+ c3_o
+ u3r_hext(u3_noun a,
+ u3_noun* b,
+ u3_noun* c,
+ u3_noun* d,
+ u3_noun* e,
+ u3_noun* f,
+ u3_noun* g);
+
/* u3r_p():
**
** & [0] if [a] is of the form [b *c].
