magicbane fixes

Revamp the Magicbane code so that it won't result in "<monster>
turns to flee" followed by "the magic-absorbing blade scares <monster>".
In the process I noticed that resistance checks for its scare and purge
effects were based on the character's experience level regardless of who
was wielding it or who its target was.

     I didn't try to retain the exact behavior it had before, but the
new behavior is pretty close.  The main differences are that the "purge"
effect is now called "cancel" and that the stun effect will be less
common now and always gives feedback when it occurs.  It used to combine
stun with scare and/or purge in some cases, now it won't; and it used to
always scare when purging, now it will pick one or the other.

doc/fixes34.1

@@ -378,6 +378,7 @@ see_monsters() wasn't called when you lost the innate warning intrinsic due
 	to level loss
 xorns sink if the drawbridge they're standing on is raised
 applying figurines to an adjacent spot over water does drowning checks
+fix sequencing of Magicbane's hit messages
 
 
 Platform- and/or Interface-Specific Fixes