Include <nlist.h> for nlist interfaces instead of depending on namespace

pollution in <kvm.h>.

libexec/rpc.rstatd/rstat_proc.c

@@ -55,6 +55,7 @@ static const char rcsid[] =
 #include <fcntl.h>
 #include <kvm.h>
 #include <limits.h>
+#include <nlist.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>

sbin/dmesg/dmesg.c

@@ -53,6 +53,7 @@ static const char rcsid[] =
 #include <fcntl.h>
 #include <kvm.h>
 #include <locale.h>
+#include <nlist.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>

usr.sbin/kernbb/kernbb.c

@@ -16,6 +16,7 @@ static const char rcsid[] =
 #include <err.h>
 #include <fcntl.h>
 #include <kvm.h>
+#include <nlist.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>