[rancid] RANCID no longer working with MikroTik RouterOS 6.49 and 7.1rc3 and 7.1rc4

[heasley]

Mon, Oct 11, 2021 at 06:28:39PM -0700, Michael Ducharme:
> Hello,
> 
> I just wanted to let you know - on the MikroTik forum I am seeing reports
> that RANCID is no longer working to back up RouterOS versions 6.49 and
> 7.1rc3 and 7.1rc4. The commands still run and there were no documented
> changes to the console or SSH on the MikroTik side recently, so I'm not
> sure why this is happening suddenly. I was trying to go through the code to
> see what the problem might be, but could not find anything.
> 
> Please see this post for details on the error:
> https://forum.mikrotik.com/viewtopic.php?p=885246#p885246

Care to the attached patch?  

> I also tried loading up the output of the working 6.48.4 vs non-working
> 6.49 into a hex editor to see if there were any unexpected characters being
> added that might be confusing RANCID but did not find anything of note. It
> looks pretty much the same to me.

I have access to only one Mikrotik and its running an older O/S.  I've
tested the patch against it.
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