New signature for static fcn my_langinfo()

This commit changes the calling sequence for my_langinfo to add the
desired locale (or a sentinel to indicate to use the current locale),
and the locale category of the desired item.

This allows the function to be able to return the desired value for any
locale, avoiding some locale changes that would happen until this
commit, and hiding the need for locale changes from outside functions,
though a couple continue to do so to avoid potential multiple changes.

embed.fnc

@@ -3220,13 +3220,15 @@ ST	|unsigned int|get_category_index|const int category|NULLOK const char * local
 S	|const char*|switch_category_locale_to_template|const int switch_category|const int template_category|NULLOK const char * template_locale
 S	|void	|restore_switched_locale|const int category|NULLOK const char * const original_locale
 #    if defined(HAS_NL_LANGINFO) || defined(HAS_NL_LANGINFO_L)
-S	|const char*|my_langinfo|const nl_item item			\
-				|bool toggle				\
+S	|const char*|my_langinfo_i|const nl_item item			\
+				|const unsigned int cat_index		\
+				|NULLOK const char * locale		\
 				|NN const char ** retbufp		\
 				|NULLOK Size_t * retbuf_sizep
 #  else
-S	|const char*|my_langinfo|const int item				\
-				|bool toggle				\
+S	|const char*|my_langinfo_i|const int item			\
+				|const unsigned int cat_index		\
+				|NULLOK const char * locale		\
 				|NN const char ** retbufp		\
 				|NULLOK Size_t * retbuf_sizep
 #  endif
@@ -3254,6 +3256,10 @@ Sr	|void	|setlocale_failure_panic_i|const unsigned int cat_index	\
 S	|void	|set_numeric_radix|const bool use_locale
 S	|void	|new_numeric	|NULLOK const char* newnum
 S	|void	|new_LC_ALL	|NULLOK const char* unused
+S	|const char *|toggle_locale_i|const unsigned switch_cat_index	\
+				|NN const char * new_locale
+S	|void	|restore_toggled_locale_i|const unsigned cat_index	\
+                                |NULLOK const char * original_locale
 ST	|bool	|is_codeset_name_UTF8|NN const char * name
 #    ifdef USE_POSIX_2008_LOCALE
 S	|const char*|emulate_setlocale_i|const unsigned int index	\

embed.h

@@ -1497,7 +1497,7 @@
 #  if !(defined(HAS_NL_LANGINFO) || defined(HAS_NL_LANGINFO_L))
 #    if defined(PERL_IN_LOCALE_C)
 #      if defined(USE_LOCALE)
-#define my_langinfo(a,b,c,d)	S_my_langinfo(aTHX_ a,b,c,d)
+#define my_langinfo_i(a,b,c,d,e)	S_my_langinfo_i(aTHX_ a,b,c,d,e)
 #      endif
 #    endif
 #  endif
@@ -1607,7 +1607,7 @@
 #  if defined(HAS_NL_LANGINFO) || defined(HAS_NL_LANGINFO_L)
 #    if defined(PERL_IN_LOCALE_C)
 #      if defined(USE_LOCALE)
-#define my_langinfo(a,b,c,d)	S_my_langinfo(aTHX_ a,b,c,d)
+#define my_langinfo_i(a,b,c,d,e)	S_my_langinfo_i(aTHX_ a,b,c,d,e)
 #      endif
 #    endif
 #  endif
@@ -1710,11 +1710,13 @@
 #define new_ctype(a)		S_new_ctype(aTHX_ a)
 #define new_numeric(a)		S_new_numeric(aTHX_ a)
 #define restore_switched_locale(a,b)	S_restore_switched_locale(aTHX_ a,b)
+#define restore_toggled_locale_i(a,b)	S_restore_toggled_locale_i(aTHX_ a,b)
 #define save_to_buffer		S_save_to_buffer
 #define set_numeric_radix(a)	S_set_numeric_radix(aTHX_ a)
 #define setlocale_failure_panic_i(a,b,c,d,e)	S_setlocale_failure_panic_i(aTHX_ a,b,c,d,e)
 #define stdize_locale(a,b,c,d)	S_stdize_locale(aTHX_ a,b,c,d)
 #define switch_category_locale_to_template(a,b,c)	S_switch_category_locale_to_template(aTHX_ a,b,c)
+#define toggle_locale_i(a,b)	S_toggle_locale_i(aTHX_ a,b)
 #      if defined(USE_POSIX_2008_LOCALE)
 #define emulate_setlocale_i(a,b,c,d)	S_emulate_setlocale_i(aTHX_ a,b,c,d)
 #define find_locale_from_environment(a)	S_find_locale_from_environment(aTHX_ a)