Imported using git-ubuntu import.

Changelog parent: 6d870771

New changelog entries:
  [ Aurelien Jarno ]
  * New upstream release: version 2.23, with git updates up to 2016-03-12:
    - Fix German translation of "Alarm clock".  Closes: #291293.
    - Fix strtol in Turkish locales.  Closes: #458611.
    - Add LFS support for fts functions.  Closes: #534521.
    - Fix build with GCC 6.  Closes: #811574.
    - Fix unbounded stack allocation in nan* functions (CVE-2014-9761).
      Closes: #813187.
    - debian/patches/localedata/locale-ku_TR.diff: rebased.
    - debian/patches/localedata/fix-lang.diff: upstreamed.
    - debian/patches/localedata/first_weekday.diff: rebased.
    - debian/patches/localedata/locale-nb_NO.diff: upstreamed.
    - debian/patches/localedata/cvs-bg_BG-t_fmt.diff: upstreamed.
    - debian/patches/alpha/local-string-functions.diff: rebased.
    - debian/patches/amd64/local-bla...