Remove experimental Unicode support.

This reverts commit 7f0f43e6f9 and some related
subsequent commits.

This compiles, but I have not done extensive testing.

Conflicts:
	include/config.h
	include/decl.h
	include/extern.h
	include/global.h
	include/tradstdc.h
	include/wintty.h
	src/drawing.c
	src/files.c
	src/hacklib.c
	src/mapglyph.c
	src/options.c
	sys/winnt/nttty.c
	win/tty/getline.c
	win/tty/topl.c
	win/tty/wintty.c

include/decl.h

@@ -320,7 +320,6 @@ E NEARDATA winid WIN_MESSAGE;
 E NEARDATA winid WIN_STATUS;
 #endif
 E NEARDATA winid WIN_MAP, WIN_INVEN;
-E nhwchar toplines[];
 
 /* pline (et al) for a single string argument (suppress compiler warning) */
 #define pline1(cstr) pline("%s", cstr)
@@ -331,6 +330,7 @@ E nhwchar toplines[];
 #define Sprintf1(buf, cstr) Sprintf(buf, "%s", cstr)
 #define panic1(cstr) panic("%s", cstr)
 
+E char toplines[];
 #ifndef TCAP_H
 E struct tc_gbl_data {	/* also declared in tcap.h */
     char *tc_AS, *tc_AE;	/* graphics start and end (tty font swapping) */