Add info links for university SSH login

Author: AgenttiX

ssh/config.d/helsinki.conf

@@ -1,6 +1,8 @@
 # University of Helsinki servers
+# https://wiki.helsinki.fi/display/it4sci/Remote+access+to+University+resources
 
 # The University of Helsinki servers require that the first login after a reboot is with a password for Kerberos to acquire its tickets.
+# https://wiki.helsinki.fi/display/it4sci/Cubbli+and+Kerberos+authentication
 # PasswordAuthentication no
 
 Match Host hile exec "! hostname | grep 'ad.helsinki.fi'"