Changes to unix

Changes to unix:
commit dc0e771a282df8ba92892b9619aed0c2b5b1bb7a
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Sat Mar 22 17:28:41 2014 +0100

    Update changelog and prepare for 2.7.0.1 release

    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>