ctdb-scripts: Strip square brackets when gathering connection info

ctdb-scripts: Strip square brackets when gathering connection info

ss added square brackets around IPv6 addresses in versions > 4.12.0
via commit aba9c23a6e1cb134840c998df14888dca469a485.  CentOS 7 added
this feature somewhere mid-release.  So, backward compatibility is
obviously needed.

As per the comment protocol/protocol_util.c should probably print and
parse such square brackets.  However, for backward compatibility the
brackets would have to be stripped in both places in
update_tickles()...  or added to the ss output when missing.  Best to
leave this until we have a connection tracking daemon.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14227

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>