luck confusion

Remove a couple of false comments about Luck, and an unreachable
switch case based upon them.  I don't know if the comment in you.h was ever
true, but it was false by the time Kevin brought across assorted changes
from slash'em however many years ago.  Full moon does not change the range
of possible Luck values, and ``rn2((Luck + 6) >> 1)'' produces a value
between 0 and 8 for prayer result, never 9.  Natural luck is always within
the range of -10 to +10, and extra luck from carrying blessed or cursed
luckstone can add or subtract another 3.  Full moon and Friday the 13th
change the equilibrium point for luck timeout but do not change the overall
range of possible values, which remains at -13 to +13.

include/you.h

@@ -1,4 +1,4 @@
-/*	SCCS Id: @(#)you.h	3.5	2005/09/12	*/
+/*	SCCS Id: @(#)you.h	3.5	2006/03/01	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -323,7 +323,7 @@ struct you {
 	schar uluck, moreluck;		/* luck and luck bonus */
 #define Luck	(u.uluck + u.moreluck)
 #define LUCKADD		3	/* added value when carrying luck stone */
-#define LUCKMAX		10	/* on moonlit nights 11 */
+#define LUCKMAX		10
 #define LUCKMIN		(-10)
 	schar	uhitinc;
 	schar	udaminc;

src/pray.c

@@ -1,4 +1,4 @@
-/*	SCCS Id: @(#)pray.c	3.5	2005/12/26	*/
+/*	SCCS Id: @(#)pray.c	3.5	2006/03/01	*/
 /* Copyright (c) Benson I. Margulies, Mike Stephenson, Steve Linhart, 1989. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -1018,7 +1018,6 @@ pleased(g_align)
 	}
 	case 7:
 	case 8:
-	case 9:		/* KMH -- can occur during full moons */
 #ifdef ELBERETH
 	    if (u.ualign.record >= PIOUS && !u.uevent.uhand_of_elbereth) {
 		gcrownu();