February 2020 options.c overhaul

combine boolean and compound options into a single allopt[] array for
processing in options.c.

move the definitions of the options into new include/optlist.h file which
uses a set of macros to define them appropriately.

during compile of options.c each option described in include/optlist.h:
   1. automatically results in a function prototype for an optfn called
      optfn_xxxx (xxxx is the option name).
   2. automatically results in an opt_xxxx enum value for referencing
      its index throughout options.c (xxxx is the option name).
   3. is used to initialize an element of the allopt[] array at index
      opt_xxxx (xxxx is the option name) based on the settings in the
      NHOPTB, NHOPTC, NHOPTP macros. Those macros only live during the
      compilation of include/optlist.h.

each optfn_xxxx() function can be called with a req id of: do_init, do_set,
get_val or do_handler.

req do_init is called from options_init, and if initialization or memory
allocation or other initialization for that particular option is needed,
it can be done in response to the init req.

req do_set is called from parseoptions() for each option it encounters
and the optfn_xxxx() function is expected to react and set the option
based on the string values that parseoptions() passes to it.

req get_val expects each optfn_xxxx() function to write the current
option value into the buffer it is passed.

req do_handler is called during doset() operations in response to player
selections most likely from the 'O' option-setting menu, but only if the
option is identified as having do_handler support in the allopts[]
'has_handler' boolean flag. Not every optfn_xxxx() does.

function special_handling() is eliminated. It's code has been redistributed
to individual handler functions for the option or purpose that they serve.

moved reglyph_darkroom() function from options.c to display.c

doc/window.doc

@@ -691,8 +691,8 @@ Two things control whether any preference setting appears in the
 'O' command options menu during the game:
  1. The option must be marked as being supported by having its 
     bit set in the window_procs wincap or wincap2 mask.
- 2. The option must have its optflag field set to SET_IN_GAME in order
-    to be able to set the option, or marked DISP_IN_GAME if you just
+ 2. The option must have its optflag field set to set_in_game in order
+    to be able to set the option, or marked set_gameview if you just
     want to reveal what the option is set to. 
 Both conditions must be true to be able to see or set the option from
 within NetHack.  
@@ -703,8 +703,8 @@ the wc_ options can be altered by calling
 	set_wc_option_mod_status(optmask, status)
 The default value for the wc2_ options can be altered by calling 
 	set_wc2_option_mod_status(optmask, status)
-In each case, set the option modification status to one of SET_IN_FILE, 
-DISP_IN_GAME, or SET_IN_GAME.
+In each case, set the option modification status to one of set_in_config, 
+set_gameview, or set_in_game.
 
 The setting of any wincap or wincap2 option is handled by the NetHack 
 core option processing code. You do not have to provide a parser in 
@@ -874,7 +874,7 @@ the option's bit in the port's wincap mask.  The port can choose to adjust
 for the change to an option that it receives notification about, or ignore it.
 The former approach is recommended.  If you don't want to deal with a
 user-initiated setting change, then the port should call 
-set_wc_option_mod_status(mask, SET_IN_FILE) to make the option invisible to 
+set_wc_option_mod_status(mask, set_in_config) to make the option invisible to 
 the user.
 
 Functions available for the window port to call:
@@ -883,16 +883,16 @@ set_wc_option_mod_status(optmask, status)
 		-- Adjust the optflag field for a set of wincap options to 
 		   specify whether the port wants the option to appear 
 		   in the 'O' command options menu, The second parameter,
-		   "status" can be set to SET_IN_FILE, DISP_IN_GAME,
-		   or SET_IN_GAME (SET_IN_FILE implies that the option
+		   "status" can be set to set_in_config, set_gameview,
+		   or set_in_game (set_in_config implies that the option
 		   is completely hidden during the game).
 
 set_wc2_option_mod_status(optmask, status)
 		-- Adjust the optflag field for a set of wincap2 options to 
 		   specify whether the port wants the option to appear 
 		   in the 'O' command options menu, The second parameter,
-		   "status" can be set to SET_IN_FILE, DISP_IN_GAME,
-		   or SET_IN_GAME (SET_IN_FILE implies that the option
+		   "status" can be set to set_in_config, set_gameview,
+		   or set_in_game (set_in_config implies that the option
 		   is completely hidden during the game).
 
 set_option_mod_status(optnam, status)