Windows startup modifications

Changes to be committed:
	modified:   include/winprocs.h
	modified:   src/options.c
	modified:   sys/share/pcmain.c
	new file:   sys/share/safeproc.c
	modified:   sys/winnt/Makefile.msc
	modified:   sys/winnt/stubs.c
	new file:   sys/winnt/windmain.c
	modified:   sys/winnt/winnt.c
	modified:   win/win32/vs2017/NetHack.vcxproj
	modified:   win/win32/vs2017/NetHackW.vcxproj
	modified:   win/win32/winhack.c

Because multiple window ports are supported on Windows
now, even in the same executable and selectable via
config file in some cases, some adjustments became
necessary. There will likely be some further refining
of this over the next day or two.

List of changes:

Move Windows startup from sys/share/pcmain.c and
into its own sys/winnt/windmain.c so that it can
be modified to fix some current breakage, and
allow altering the order of some things.

There is startup processing code that is common to
all of the Windows WindowPorts, but that startup
processing code needs to have no dependency on
any one of those WindowPorts.

Yet, during startup processing, some of the initialization
routines can end up calling NetHack functions that
expect an active Window port underneath, and if there
isn't one, routines like pline, impossible, panic can
end up invoking null function pointers.

Place a new file sys/share/safeproc.c, in which a complete
window port is available for early startup processing
purposes. It's WindowPort name field is set to
"safe-startup" just for reference.  The prototypes in
include/winprocs.h require that SAFEPROCS be

Usage:

 windowprocs = get_safe_procs(0);
initializes a set of winprocs function pointers that ensure
none of the function pointers are left null, but that's all it does.

 windowprocs = get_safe_procs(1);
initializes a set of winprocs functions pointers that ensure
none of the function pointers are left null, but also
provides some basic output and input functionality using nothing
other than C stdio routines (no platform or OS specific code).

The conditional code related to WIN32 has been removed from
sys/share/pcmain.c

The code common to all of the Windows WindowPorts calls
get_safe_procs() almost immediately to ensure that
there is a set of WindowPort winprocs available.

include/winprocs.h

@@ -375,4 +375,77 @@ struct chain_procs {
 };
 #endif /* WINCHAIN */
 
+#ifdef SAFEPROCS
+/*
+ * window port routines available in sys/share/safeproc.c
+ */
+extern struct window_procs *FDECL(get_safe_procs, (int));
+extern void FDECL(safe_init_nhwindows, (int *, char **));
+extern void NDECL(safe_player_selection);
+extern void NDECL(safe_askname);
+extern void NDECL(safe_get_nh_event);
+extern void FDECL(safe_exit_nhwindows, (const char *));
+extern void FDECL(safe_suspend_nhwindows, (const char *));
+extern void NDECL(safe_resume_nhwindows);
+extern winid FDECL(safe_create_nhwindow, (int));
+extern void FDECL(safe_clear_nhwindow, (winid));
+extern void FDECL(safe_display_nhwindow, (winid, BOOLEAN_P));
+extern void FDECL(safe_destroy_nhwindow, (winid));
+extern void FDECL(safe_curs, (winid, int, int));
+extern void FDECL(safe_putstr, (winid, int, const char *));
+extern void FDECL(safe_putmixed, (winid, int, const char *));
+extern void FDECL(safe_display_file, (const char *, BOOLEAN_P));
+extern void FDECL(safe_start_menu, (winid));
+extern void FDECL(safe_add_menu, (winid, int, const ANY_P *, CHAR_P, CHAR_P,
+                                  int, const char *, BOOLEAN_P));
+extern void FDECL(safe_end_menu, (winid, const char *));
+extern int FDECL(safe_select_menu, (winid, int, MENU_ITEM_P **));
+extern char FDECL(safe_message_menu, (CHAR_P, int, const char *));
+extern void NDECL(safe_update_inventory);
+extern void NDECL(safe_mark_synch);
+extern void NDECL(safe_wait_synch);
+#ifdef CLIPPING
+extern void FDECL(safe_cliparound, (int, int));
+#endif
+#ifdef POSITIONBAR
+extern void FDECL(safe_update_positionbar, (char *));
+#endif
+extern void FDECL(safe_print_glyph, (winid, XCHAR_P, XCHAR_P, int, int));
+extern void FDECL(safe_raw_print, (const char *));
+extern void FDECL(safe_raw_print_bold, (const char *));
+extern int NDECL(safe_nhgetch);
+extern int FDECL(safe_nh_poskey, (int *, int *, int *));
+extern void NDECL(safe_nhbell);
+extern int NDECL(safe_doprev_message);
+extern char FDECL(safe_yn_function, (const char *, const char *, CHAR_P));
+extern void FDECL(safe_getlin, (const char *, char *));
+extern int NDECL(safe_get_ext_cmd);
+extern void FDECL(safe_number_pad, (int));
+extern void NDECL(safe_delay_output);
+#ifdef CHANGE_COLOR
+extern void FDECL(safe_change_color, (int, long, int));
+#ifdef MAC
+extern void FDECL(safe_change_background, (int));
+extern short FDECL(safe_set_font_name, (winid, char *));
+#endif
+extern char *NDECL(safe_get_color_string);
+#endif
+extern void NDECL(safe_start_screen);
+extern void NDECL(safe_end_screen);
+extern void FDECL(safe_outrip, (winid, int, time_t));
+extern void FDECL(safe_preference_update, (const char *));
+extern char *FDECL(safe_getmsghistory, (BOOLEAN_P));
+extern void FDECL(safe_putmsghistory, (const char *, BOOLEAN_P));
+extern void NDECL(safe_status_init);
+extern void NDECL(safe_status_finish);
+extern void FDECL(safe_status_enablefield,
+                    (int, const char *, const char *, BOOLEAN_P));
+extern void FDECL(safe_status_update, (int, genericptr_t, int, int, int, unsigned long *));
+extern boolean NDECL(safe_can_suspend);
+extern void FDECL(stdio_raw_print, (const char *));
+extern void FDECL(stdio_raw_print_bold, (const char *));
+extern void NDECL(stdio_wait_synch);
+extern int NDECL(stdio_nhgetch);
+#endif /* SAFEPROCS */
 #endif /* WINPROCS_H */
+