Enable UTF8 in gnulib regexp.
* config.h.in (RE_ENABLE_I18N) [!GRUB_UTIL]: New define. * grub-core/lib/posix_wrap/ctype.h (islower): Use grub_islower. (isupper): Use grub_isupper. (isascii): New inline function. * grub-core/lib/posix_wrap/wchar.h: Replace dummy with real contents. * grub-core/lib/posix_wrap/wctype.h: Likewise. * grub-core/normal/charset.c (grub_utf8_process): New function. (grub_utf8_to_utf16): Use grub_utf8_process. (grub_encode_utf8_character): New function. (grub_ucs4_to_utf8): Use grub_encode_utf8_character. * include/grub/charset.h (grub_utf8_process): New declaration. (grub_encode_utf8_character): Likewise. * include/grub/misc.h (grub_islower): New inline function. (grub_isupper): Likewise. (grub_strchrsub): Moved down to fix the definitions.
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/* Define to 1 to enable disk cache statistics. */
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#define DISK_CACHE_STATS @DISK_CACHE_STATS@
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#define RE_ENABLE_I18N 1
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#if defined(__i386__)
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#define NESTED_FUNC_ATTR __attribute__ ((__regparm__ (1)))
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#else
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