C/#name menu, calling old discoveries [2 of 2] (trunk only)

Implement <Someone>'s menu-mode for #name, primarily because it
is the natural place to add [re]naming entries in the discoveries list,
something that was requested in the newsgroup ten or so years ago.  The
latter allows changing the type name of something which has previously
been named and is no longer being carried.

     This also makes the C command become a synonym for #name or vice
versa; one or the other could now be reassigned to something else.

dat/hh

@@ -45,7 +45,7 @@ Game commands:
 a       apply   apply or use a tool (pick-axe, key, camera, etc.)
 A       armor   take off all armor
 c       close   close a door
-C       call    name an individual monster (ex. baptize your dog)
+C       call    name a monster, an individual object, or a type of object
 d       drop    drop an object.  d7a:  drop seven items of object 'a'
 D       Drop    drop selected types of objects
 e       eat     eat something
@@ -100,7 +100,7 @@ M-i     invoke  invoke an object's special powers
 M-j     jump    jump to another location
 M-l     loot    loot a box on the floor
 M-m     monster use a monster's special ability
-M-n     name    name an item or type of object
+M-n     name    name a monster, an individual object, or a type of object
 M-o     offer   offer a sacrifice to the gods
 M-p     pray    pray to the gods for help
 M-q     quit    stop playing