Clean up c_permit values of deity commands

A player may execute a command when his player->nstat has all the bits
in the command's c_permit.

Normal player commands require bit(2).  Command break requires bit(1),
and execute requires bit(5).  Deity commands require both bit(2) and
bit(3).  Works, because deities always have both bits set in nstat, as
they may execute normal player commands, too.  But it's a bit
confusing.  Change them to only require their own bit(3).

include/player.h

@@ -41,13 +41,13 @@
 #include "queue.h"
 #include "types.h"
 
-	/* nstat values */
-#define SANCT		bit(1)
-#define NORM		bit(2)
-#define GOD		(bit(3) | NORM)
-#define EXEC		bit(5)
-#define CAP		bit(6)
-#define MONEY		bit(7)
+	/* player command capabilities */
+#define SANCT	bit(1)	/* can execute commands available in sanctuary */
+#define NORM	bit(2)	/* can execute active player commands */
+#define GOD	bit(3)	/* can execute deity commands */
+#define EXEC	bit(5)	/* can execute the execute command */
+#define CAP	bit(6)	/* has capital */
+#define MONEY	bit(7)	/* isn't broke */
 
 enum player_sleep {
     PLAYER_SLEEP_NEVER, PLAYER_SLEEP_ON_INPUT, PLAYER_SLEEP_FREELY