Document cpu -R -O.
 [rsc] --rw-rw-r-- M 838257 glenda sys 3804 Oct  4 23:31 sys/man/1/cpu
	/n/sourcesdump/2005/1004/plan9/sys/man/1/cpu:1,6 - 
	/n/sourcesdump/2005/1005/plan9/sys/man/1/cpu:1,6
	  .TH CPU 1
	  .SH NAME
	- cpu \- connection to cpu server
	+ cpu \- connection to CPU server
	  .SH SYNOPSIS
	  .B cpu
	  [
	/n/sourcesdump/2005/1004/plan9/sys/man/1/cpu:25,30 - 
	/n/sourcesdump/2005/1005/plan9/sys/man/1/cpu:25,37
	  .B -c
	  .I cmd args ...
	  ]
	+ .PP
	+ .B cpu
	+ [
	+ .B -R
	+ |
	+ .B -O
	+ ]
	  .SH DESCRIPTION
	  .I Cpu
	  starts an
	/n/sourcesdump/2005/1004/plan9/sys/man/1/cpu:132,138 - 
	/n/sourcesdump/2005/1005/plan9/sys/man/1/cpu:139,145
	  .L clear
	  specifies no encryption algorithm and can be used to talk
	  to older versions of the
	- .B cpu
	+ .I cpu
	  service.
	  .PP
	  The
	/n/sourcesdump/2005/1004/plan9/sys/man/1/cpu:155,163 - 
	/n/sourcesdump/2005/1005/plan9/sys/man/1/cpu:162,184
	  and
	  .B objtype
	  environment variables reflect the server's architecture.
	+ .PP
	+ The
	+ .B -R
	+ flag causes
	+ .I cpu
	+ to run the server (remote) side of the protocol.
	+ It is run from service files such as
	+ .BR /bin/service/tcp17010 .
	+ The
	+ .B -O
	+ flag is similar but simulates the pre-9P2000 version
	+ of the 
	+ .I cpu
	+ protocol.
	  .SH FILES
	  The name space of the terminal side of the
	- .B cpu
	+ .I cpu
	  command is mounted, via
	  .IR exportfs (4),
	  on the CPU side on directory