M29 - unconscious effects when not unconscious

While auditing nomul() I noticed unconscious() treats (multi < 0 && !nomovemsg)
as unconscious.  This explains the behavior in M29 (unconscious message
while performing #turn).  I checked all the places with this combination,
and found a few that did not appear to fall under the "unconscious" category.
Most I changed to use You_can_move_again to ensure the same display w/o the
unconscious behavior. Also:
- found another string that unconscious() should have considered
- vomit() now sets nomovemsg, one caller was also doing this redundantly
- vomiting_dialogue() was calling stop_occupation() after vomit(), which can
  reset multi.  I reversed the order and removed a doubly-redundant nomul call.

tele() still has a problem: some cases where multi < 0 should probably take
a branch like the unconscious() branch but with a different message.
doturn()'s behavior - turn then wait - is also less than perfect, but I
think this is a known problem.

src/uhitm.c

@@ -2328,7 +2328,7 @@ boolean wep_was_destroyed;
 		    You("momentarily stiffen.");
 		} else { /* gelatinous cube */
 		    You("are frozen by %s!", mon_nam(mon));
-	    	    nomovemsg = 0;	/* default: "you can move again" */
+	    	    nomovemsg = You_can_move_again;
 		    nomul(-tmp);
 		    exercise(A_DEX, FALSE);
 		}