monpolycontrol, wizdebug_*

Demote #monpolycontrol and #wizdebug_traveldisplay from commands to
simple boolean options.  The former has the same name, the latter
is called travel_debug.  Rename #wizdebug_bury to #wizbury; it
shouldn't matter that it goes away when compiled without DEBUG.

There are now five wizard-mode boolean options:  monpolycontrol,
sanity_check, and wizweight are documented in the Guidebook;
menu_tab_sep and travel_debug are commented out there.

Guidebook.mn has been tested; Guidebook.tex has not.

dat/wizhelp

@@ -11,7 +11,6 @@ Debug-Mode Quick Reference:
 
 #levelchange    == set hero's experience level
 #lightsources   == show mobile light sources
-#monpolycontrol == control monster polymorphs
 #panic          == panic test (warning: current game will be terminated)
 #polyself       == polymorph self
 #seenv          == show seen vectors
@@ -27,3 +26,7 @@ Debug-Mode Quick Reference:
 #wizwhere       == show dungeon placement of all special levels
 #wmode          == show wall modes
 
+Options:
+monpolycontrol  == prompt for new form whenever any monster changes shape
+sanity_check    == evaluate monsters, objects, and map prior to each turn
+wizweight       == augment object descriptions with their objects' weight