git: libc/readpassphrase: Sync with OpenBSD

[Rimvydas Jasinskas]

commit f02fcc434de7a04c21453a2e361037c534f56eaf
Author: zrj <rimvydas.jasinskas at gmail.com>
Date:   Fri Aug 19 14:07:27 2016 +0300

    libc/readpassphrase: Sync with OpenBSD
    
    Mainly for better terminal and signal handling.
    Also include few fixes done by FreeBSD.
    
    Taken-from: FreeBSD

Summary of changes:
 include/readpassphrase.h      |  43 +++++------
 lib/libc/gen/readpassphrase.3 |  49 ++++++-------
 lib/libc/gen/readpassphrase.c | 162 ++++++++++++++++++++++++------------------
 3 files changed, 134 insertions(+), 120 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/f02fcc434de7a04c21453a2e361037c534f56eaf


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