3.7: fix #9397 - pronouns when hallucinating

Developed for 3.6 but deferred to 3.7.  Most of the testing was with
the earlier incarnation.

Report was that pronouns were accurate for the underlying monsters
when hallucination was describing something random, and also that the
gender prefix flag from bogusmon.txt wasn't being used.  The latter
is still the case, but pronouns are now chosen at random while under
the influence of hallucination.  One of the choices is plural and an
attempt is made to make the monster name and verb fit that usage.

|The homunculus picks up a wand of speed monster.
|The large cats zap themselves with a wand of speed monster!
|The blue dragon is suddenly moving faster.

There is no attempt to match gender for the singular cases; you might
get
|The succubus zaps himself [...]
or
|The incubus zaps herself [...]

src/steed.c

@@ -1,4 +1,4 @@
-/* NetHack 3.6	steed.c	$NHDT-Date: 1573940541 2019/11/16 21:42:21 $  $NHDT-Branch: NetHack-3.6 $:$NHDT-Revision: 1.67 $ */
+/* NetHack 3.6	steed.c	$NHDT-Date: 1574648944 2019/11/25 02:29:04 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.74 $ */
 /* Copyright (c) Kevin Hugo, 1998-1999. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -377,7 +377,7 @@ exercise_steed()
 void
 kick_steed()
 {
-    char He[4];
+    char He[BUFSZ]; /* monverbself() appends to the "He"/"She"/"It" value */
     if (!u.usteed)
         return;
 
@@ -400,7 +400,9 @@ kick_steed()
             if (u.usteed->msleeping || !u.usteed->mcanmove)
                 pline("%s stirs.", He);
             else
-                pline("%s rouses %sself!", He, mhim(u.usteed));
+                /* if hallucinating, might yield "He rouses herself" or
+                   "She rouses himself" */
+                pline("%s!", monverbself(u.usteed, He, "rouse", (char *) 0));
         } else
             pline("%s does not respond.", He);
         return;