* fhandler.h (fhandler_console::trunc_buf): Add to use as cache for

truncated multibyte characters on input.
	(fhandler_console::write_replacement_char): Declare new method.
	* fhandler_console.cc (CONVERT_LIMIT): Raise to 64K.
	(fhandler_console::fhandler_console): Initialize trunc_buf.
	(ERR): Define as independent value again.
	(fhandler_console::write_replacement_char): New method to print
	replacement chars.
	(fhandler_console::write_normal): Add handling for truncated multibyte
	sequences.  Call next_char instead of pathetic CharNextExA function.
	Don't change src, rather just work with found later on.
	* miscfuncs.cc (is_cp_multibyte): Move here from strfuncs.cc.
	Don't call Windows function, restrict to well-known ANSI/OEM codepages
	and UTF-8.
	(next_char): Call CharNextExA only for doublebyte codepages.
	Implement for UTF-8 here.
	* strfuncs.cc (is_cp_multibyte): Move to miscfuncs.cc.
	* winsup.h (next_char): Declare.
	* include/limits.h (MB_LEN_MAX): Set to maximum value of MB_CUR_MAX
	as defined by newlib for now.

winsup/cygwin/winsup.h

@@ -110,6 +110,7 @@ extern const char case_folded_upper[];
 /* The one function we use from winuser.h most of the time */
 extern "C" DWORD WINAPI GetLastError (void);
 
+/* Codepage and multibyte string specific stuff. */
 enum codepage_type {ansi_cp, oem_cp, utf8_cp};
 extern codepage_type current_codepage;
 extern UINT active_codepage;
@@ -117,6 +118,8 @@ extern UINT active_codepage;
 void codepage_init (const char *buf);
 UINT get_cp ();
 bool is_cp_multibyte (UINT cp);
+const unsigned char *next_char (UINT cp, const unsigned char *str,
+				const unsigned char *end);
 
 /* Used as type by sys_wcstombs_alloc and sys_mbstowcs_alloc.  For a
    description see there. */