The Shomiti document is available on the Wayback Machine.

I don't know why it was unavailable at some point, but it appears to be
available again.  Update the comment to reflect that.

Change-Id: I7dc1fcb554e73d3b0fc2bd2fbdf6235e791a4253
Reviewed-on: https://code.wireshark.org/review/4200
Reviewed-by: Guy Harris <guy@alum.mit.edu>