Bug#748215: Provide a C.UTF-8 locale by default

[Jérémy Lal <kapouer@melix.org>]

Package: libc6
Version: 2.24-2
Followup-For: Bug #748215

Something important has changed w.r.t. that matter:

export LANG=C.UTF-8
echo "ça va が" | iconv -f UTF-8 -t 'ascii//translit'

in Jessie, it returns expectedly

> ca va iconv: illegal input sequence at position 7

in Stretch, it returns

> ?a va ?

Causing a bug like
https://bugs.debian.org/837285
because using C.UTF-8 for LC_CTYPE was the only way i found to get
ascii//translit to throw an error when it cannot find a match.

Is there now another way to get the same result ?

Jérémy.


-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.6.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_FR.utf8, LC_CTYPE=fr_FR.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libc6 depends on:
ii  libgcc1  1:6.2.0-3

libc6 recommends no packages.

Versions of packages libc6 suggests:
ii  debconf [debconf-2.0]  1.5.59
pn  glibc-doc              <none>
ii  libc-l10n              2.24-2
ii  locales                2.24-2

-- debconf information excluded