Modified Files:
   	syssrc/sys/arch/powerpc/conf: files.powerpc
   	syssrc/sys/arch/powerpc/powerpc: trap.c
   Removed Files:
   	syssrc/sys/arch/powerpc/powerpc: copyinstr.c copyoutstr.c
   
   Log Message:
   reimplement copy{in,out}str() similarly to copy{in,out}()
   (instead of the old way of calling [fs]ubyte() in a loop).


does this have a performance benefit?  (i assume so)  did you
happen to measure it? :)