nfs(4): fix typos
 [rsc] --rw-rw-r-- M 1435545 rsc sys 1446 Feb 20 09:52 sys/lib/kbmap/svorak

Your text here.
 [rsc] --rw-rw-r-- M 1435545 rsc sys 4475 Feb 20 09:50 sys/man/4/nfs
	/n/sourcesdump/2006/0220/plan9/sys/man/4/nfs:51,57 - 
	/n/sourcesdump/2006/0221/plan9/sys/man/4/nfs:51,57
	  .I nfs
	  queries the port mapper to find the addresses
	  of the NFS mount service and file service.
	- If two addresses are given, the port mapper is bypasswd;
	+ If two addresses are given, the port mapper is bypassed;
	  .I addr1
	  is used as the address of the NFS mount service,
	  and
	/n/sourcesdump/2006/0220/plan9/sys/man/4/nfs:101,107 - 
	/n/sourcesdump/2006/0221/plan9/sys/man/4/nfs:101,107
	  as decimal numbers, and everyone attaches as uid \-1
	  .RB ( nobody
	  on most Unix systems).
	- .PD
	+ .PP
	  .I Portmap
	  and
	  .I nfsmount