+8. incoming messages for users will now send a 'new message' message (instead
+of merely generating the message)[who wrote this rubbish?].
+9. Hooked $SIG{__WARN__} and $SIG{__DIE__} so we store these nasty error
+messages.
+10. Print the no of users on restricted protocol links if we have had PC50
+11. Had a go at making the sh/cl stats more accurate.
+12. PC11 was trying to call Local::spot1 instead of Local::spot, no warning
+previously.
+13. Added a simple lockfile to prevent more than one cluster running at a time