On the Mac, support for setting the line codepage and for combining

characters.  I've just used libcharset in macucs.c since there seemed
little reason not to, and implemented combining characters by naive
overprinting.  It's not yet a lot of use without the ability to select
a font, of course.

[originally from svn r5322]

mac/macstuff.h

@@ -8,6 +8,7 @@ typedef void *Context; /* FIXME */
 #include <Files.h>
 
 #include <stdio.h>
+#include "charset.h"
 
 struct Filename {
     FSSpec fss;
@@ -63,3 +64,6 @@ extern int strnicmp(char const *, char const *, size_t);
 #define HELPCTX(foo) I(0)
 
 #define FILTER_KEY_FILES "pAgt.PPK"
+
+#define CP_UTF8 CS_UTF8		       /* from libcharset */
+