Revert rev. 1.27. This file only included <sys/select.h> because of

brokenness introduced in <sys/select.h> rev. 1.8 which is now OBE.
<sys/tty.h> and <sys/selinfo.h> together do the right thing.

lib/libkvm/kvm_proc.c

@@ -54,9 +54,6 @@ static char sccsid[] = "@(#)kvm_proc.c	8.3 (Berkeley) 9/23/93";
 #include <sys/exec.h>
 #include <sys/stat.h>
 #include <sys/ioctl.h>
-#define _KERNEL
-#include <sys/select.h>
-#undef _KERNEL
 #include <sys/tty.h>
 #include <sys/file.h>
 #include <stdio.h>