Sunsword redux (trunk only)

This started out as a one line change.  After I saw someone in the
newsgroup mention that Sunsword's light was inferior to that of a lamp,
I decided to make it work better (than in 3.4.3, that is, becoming the
same brightness as a lamp) when blessed and worse when cursed (useless to
hero but still visible if wielded by a monster).  But then it needed to
change light radius when its curse/bless state changed, and it needed
message feedback when doing so, and that got kind of complicated.  I
wouldn't have bothered if I'd known what I was getting into, but I don't
want to throw it away now that I've done all this work....

     Sunsword now gives a light radius of 3 when blessed (same as a lit
lamp), radius of 2 when uncursed (same as a lit candle and as it has been
providing since added in 3.4.0), and a radius of 1 when cursed (nearly
but not completely useless, as mentioned above).  Also, it now "shines"
rather than "glows" since we usually use the latter for temporary effects.

doc/fixes35.0

@@ -300,6 +300,7 @@ message sequencing for fatal explosions was confusing if feedback was given
 	for carried items being destroyed
 when dipping something in holy/unholy water, only learn its new bless/curse
 	state if hero sees it glow
+describe lit Sunsword as shining rather than glowing
 
 
 Platform- and/or Interface-Specific Fixes
@@ -419,6 +420,7 @@ streamline old ^X output and integrate it with enlightenment feedback;
 eating disenchanter corpses is now considered risky
 make '[' command more precise when poly'd hero has embedded dragon scales/mail
 fainting while wielding a cockatrice corpse will be fatal
+Sunsword's light radius depends on its curse/bless state
 
 
 Platform- and/or Interface-Specific New Features