Make ssh_cli.erl handle <CTRL>+C

Dear all,

I've found that ssh_cli.erl does not scan the input received from the
remote for occurrences of <CTRL>+C to signal the user's interrupt
requests to the group_leader of the CLI session. The patch attached to
this e-mail fixes the issue.

Kind regards,

--
Dr. Stefan Zegenhagen

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>From f1d056ed1bf419677098cdc57bc7ce8a327e6b43 Mon Sep 17 00:00:00 2001
From: Stefan Zegenhagen <[email protected]>
Date: Mon, 6 May 2013 14:29:45 +0200
Subject: [PATCH] [SSH-CLI] properly handle <CTRL>+C as shell interrupt

In ssh_cli.erl, check for the presence of <CTRL>+C in data received from
the remote. If detected, use the established mechanism (send an
'interrupt' exit signal to the group_leader) to signal an interrupt to
the shell.

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