This change implements the following gettext features, as
discussed recently in python-dev:

In _locale module:

- bind_textdomain_codeset() binding

In gettext module:

- bind_textdomain_codeset() function
- lgettext(), lngettext(), ldgettext(), ldngettext(),
  which return translated strings encoded in
  preferred system encoding, if
  bind_textdomain_codeset() was not used.
- Added equivalent functionality in translate()
  function and catalog classes.

Every change was also documented.
diff --git a/configure.in b/configure.in
index 77522c3..f73d1ce 100644
--- a/configure.in
+++ b/configure.in
@@ -2044,8 +2044,8 @@
 AC_MSG_RESULT(MACHDEP_OBJS)
 
 # checks for library functions
-AC_CHECK_FUNCS(alarm chown clock confstr ctermid execv \
- fork fpathconf ftime ftruncate \
+AC_CHECK_FUNCS(alarm bind_textdomain_codeset chown clock confstr ctermid \
+ execv fork fpathconf ftime ftruncate \
  gai_strerror getgroups getlogin getloadavg getpeername getpgid getpid \
  getpriority getpwent getsid getwd \
  kill killpg lchown lstat mkfifo mknod mktime \