leak(1): add kmem to heading
 [rsc] --rw-rw-r-- M 628694 glenda sys 3291 Apr 10 12:09 sys/man/1/leak
	/n/sourcesdump/2006/0410/plan9/sys/man/1/leak:1,6 - 
	/n/sourcesdump/2006/0411/plan9/sys/man/1/leak:1,6
	  .TH LEAK 1
	  .SH NAME
	- leak \- examine family of processes for memory leaks
	+ leak, kmem \- help find memory leaks
	  .SH SYNOPSIS
	  .B leak
	  [