[rancid] Foundry/Brocade addition - show media

[Roman Hochuli]

Hello Michael

> I checked the command on an icx 6610 device with fw version 8 and it exists.

It seems you're right. I even found some documentation for it after
digging into it:
http://www.brocade.com/downloads/documents/html_product_manuals/FI_08010_ADMIN/GUID-DB102C16-80A4-4AAC-B400-DB564D79DACD.html

Apparently really a new feature in FastIron firmware release 8.

-- 
Best regards,
Roman Hochuli
Operations Manager

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