FileLogger stuff to do;  as of 21/02/2000 (Luke)
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* The trapping of stuff that SysLog is writing to our log should obviously not be logged :)
  Currently this routine doesn't work, partly cos ExtASM GSTrans' the string literals (Why FFS?  Why?), and partly cos it broke summat.  I'll fix it once I have a decent assembler
  
* Add full information for the trapping of OS_FSControl.

* Add OS_Byte info

* In theory OS_ChangeRedirection and OS_NewLine could be used for file stuff?
  (No vectors afaik, so have to sit on SWI on summat, yuck)