[nsp] Image for 7500 with SSH2 Server Support

[Ian Dickinson]

>Interesting to note that SCP is supported? Not sure what the 
>implications are yet but hopefully we can use it to copy configs instead 
>of tftp :)

Works on 12.2(17d)SXB - support hasn't been added to CISCO-CONFIG-COPY-MIB
yet, and you can't store keys for scripted operations, which reduces the
value of it a little.  Quite useful for copying the 35Mb images on Sups
where TFTP starts getting into trouble with a file that size.

Ian