[rancid] Avoid Boot Flash :Flash changes in cisco routers

['heasley']

Mon, Jun 26, 2017 at 08:16:28PM +0530, Nalin Fernando:
> Dear Mr.Heasley,
> 
> I have not limited the commands. I want rancid to stop sending mails about
> frequent Flash, NVRAM, BootFlash changes of cisco xr routers. I have set to
> run Rancid hourly. So every Hour I am getting below mail for cisco xr
> routers.
> 
>   !Image: disk0:asr9k-os-mbi-5.3.4/0x100305/mbiasr9k-rsp3.vm
> - !Image: Mon Jun 26 19:02:05.124 IST
> + !Image: Mon Jun 26 20:02:04.335 IST

the line is from the tty timestamp mis-feature, disabled with on of

terminal no-timestamp
terminal exec prompt no-timestamp

if you want to disable dir commands in rancid, see rancid.types.conf(5).