[POSIX:2008] multi-locale version of w?ctype.h and wchar.h API support.

[Takehiko NOZAKI]

The Open Group Technical Standard, 2006, Extended API Set Part 4 is finally incorporated by POSIX:2008.

• http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/locale.h.html
• http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/ctype.h.html
• http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/wchar.h.html

[Takehiko NOZAKI]

almost done, see tnozaki-citrus-multi-locale branch.