Imported using git-ubuntu import.

Changelog parent: c308309d

New changelog entries:
  * New upstream release: version 2.21, with git updates up to 2015-02-10:
    - debian/patches/git-updates.diff: Updated.
    - debian/patches/all/submitted-po-fr-fixes.diff: Rebased.
    - debian/patches/alpha/cvs-__pointer_chk_guard.diff: Merged.
    - debian/patches/alpha/cvs-unwind-backtrace.diff: Merged.
    - debian/patches/alpha/local-gcc4.1.diff: Rebased.
    - debian/patches/alpha/local-lowlevellock.diff: Dropped.
    - debian/patches/alpha/local-string-functions.diff: Rebased.
    - debian/patches/alpha/submitted-PTR_MANGLE.diff: Rebased.
    - debian/patches/alpha/submitted-dl-support.diff: Rebased.
    - debian/patches/alpha/submitted-lll_futex_timed_wait_bitset.diff: Dropped.
    - debian/patches/alpha/submitted-rtld-fPIC.diff: Rebased.
    - debian/patches/amd64/cvs-slow-sse42.diff: Merged.
    - deb...