[oss] SSH port used for task #3 in assignment #3

[Razvan Deaconescu]

Hi, everyone.

Please note that after finding out the private key for task #3 in
assignment #3 you should use the proper SSH port (12322) when connecting
to the server to test the task.

We've updated the assignment description accordingly[1].

[1] http://ocw.cs.pub.ro/courses/cns/assignments/assignment-3#decoding_the_public_key

Razvan