No locales => don't use isspace(), toLower() etc.

This commit changes what happens on platforms without locale handling to
use our precomputed definitions of what the various character class
definitions and case changing operations are.  Previously, it just
called the libc locale-dependent functions and made sure the result was
ASCII.  I think this is a holdover from before we had the precomputed
definitions

handy.h

@@ -2000,22 +2000,22 @@ END_EXTERN_C
 #  endif
 #else  /* The final fallback position */
 
-#  define isALPHA_LC(c)	        (isascii(c) && isalpha(c))
-#  define isALPHANUMERIC_LC(c)  (isascii(c) && isalnum(c))
-#  define isCNTRL_LC(c)	        (isascii(c) && iscntrl(c))
-#  define isDIGIT_LC(c)	        (isascii(c) && isdigit(c))
-#  define isGRAPH_LC(c)	        (isascii(c) && isgraph(c))
-#  define isLOWER_LC(c)	        (isascii(c) && islower(c))
-#  define isPRINT_LC(c)	        (isascii(c) && isprint(c))
-#  define isPUNCT_LC(c)	        (isascii(c) && ispunct(c))
-#  define isSPACE_LC(c)	        (isascii(c) && isspace(c))
-#  define isUPPER_LC(c)	        (isascii(c) && isupper(c))
-#  define isWORDCHAR_LC(c)	(isascii(c) && (isalnum(c) || (c) == '_'))
-#  define isXDIGIT_LC(c)        (isascii(c) && isxdigit(c))
-
-#  define toLOWER_LC(c)	(isascii(c) ? tolower(c) : (c))
-#  define toUPPER_LC(c)	(isascii(c) ? toupper(c) : (c))
-#  define toFOLD_LC(c)          toLOWER_LC(c)
+#  define isALPHA_LC(c)         generic_isCC_A_(c, CC_ALPHA_)
+#  define isALPHANUMERIC_LC(c)  generic_isCC_A_(c, CC_ALPHANUMERIC_)
+#  define isCNTRL_LC(c)	        generic_isCC_A_(c, CC_CNTRL_)
+#  define isDIGIT_LC(c)         generic_isCC_A_(c, CC_DIGIT_)
+#  define isGRAPH_LC(c)         generic_isCC_A_(c, CC_GRAPH_)
+#  define isLOWER_LC(c)         generic_isCC_A_(c, CC_LOWER_)
+#  define isPRINT_LC(c)         generic_isCC_A_(c, CC_PRINT_)
+#  define isPUNCT_LC(c)         generic_isCC_A_(c, CC_PUNCT_)
+#  define isSPACE_LC(c)	        generic_isCC_A_(c, CC_SPACE_)
+#  define isUPPER_LC(c)         generic_isCC_A_(c, CC_UPPER_)
+#  define isWORDCHAR_LC(c) (UNLIKELY((c) == '_') || isALPHANUMERIC_LC(c))
+#  define isXDIGIT_LC(c)        generic_isCC_A_(c, CC_XDIGIT_)
+
+#  define toLOWER_LC(c)             toLOWER_A(c)
+#  define toUPPER_LC(c)             toUPPER_A(c)
+#  define toFOLD_LC(c)              toFOLD_A(c)
 
 #endif