libICE: Changes to 'master'

[Peter Hutterer]

 configure.ac  |    2 -
 src/iceauth.c |   65 +++++++++++++++++++++++++++++++++++++++++-----------------
 2 files changed, 47 insertions(+), 20 deletions(-)

New commits:
commit ff5e59f32255913bb1cdf51441b98c9107ae165b
Author: Benjamin Tissoires <benjamin.tissoires at gmail.com>
Date:   Tue Apr 4 19:12:53 2017 +0200

    Use getentropy() if arc4random_buf() is not available
    
    This allows to fix CVE-2017-2626 on Linux platforms without pulling in
    libbsd.
    The libc getentropy() is available since glibc 2.25 but also on OpenBSD.
    For Linux, we need at least a v3.17 kernel. If the recommended
    arc4random_buf() function is not available, emulate it by first trying
    to use getentropy() on a supported glibc and kernel. If the call fails,
    fall back to the current (partly vulnerable) code.
    
    Signed-off-by: Benjamin Tissoires <benjamin.tissoires at gmail.com>
    Reviewed-by: Mark Kettenis <kettenis at openbsd.org>
    Reviewed-by: Alan Coopersmith <alan.coopersmith at oracle.com>
    Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>