tracking peak maximum HP and energy

Keep track of the highest value that u.uhpmax and u.uenmax have
attained, in new u.uhppeak and u.uenpeak.  They aren't used for
anything yet.  u.mhmax (max HP while polymorphed) isn't interesting
enough to track.

Not save and bones compatible so increments EDITLEVEL.

include/patchlevel.h

@@ -17,7 +17,7 @@
  * Incrementing EDITLEVEL can be used to force invalidation of old bones
  * and save files.
  */
-#define EDITLEVEL 45
+#define EDITLEVEL 46
 
 /*
  * Development status possibilities.