(loc_t): New type to keep locale information for printing.
(print_codeset): New function to print codeset as on Linux.
(print_locale_with_codeset): New function to print single locale.
Print verbose style as the Linux locale(1) tool.
(print_locale): New function to print single locale plus its UTF-8
variation, if available.
(compare_locales): New helper function for bsearch and qsort on loc_t.
(add_locale): New function to store locale in loc_t array.
(add_locale_alias_locales): New function to store locales from
locale.alias file in loc_t.
(print_all_locales): Call add_locale instead of printlocale.
Call add_locale_alias_locales, sort locales alphabetically and print
them.