Avoid rebuilding services database every boot time.

The database has been renamed since the default was changed to CDB format.

etc/rc.d/sysdb

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# $NetBSD: sysdb,v 1.22 2011/09/02 07:13:28 mbalmer Exp $
+# $NetBSD: sysdb,v 1.23 2012/02/21 12:30:32 nakayama Exp $
 #
 
 # PROVIDE: sysdb
@@ -52,7 +52,7 @@ check_file()
 
 build_services()
 {
-	check_file /etc/services /var/db/services.db services_mkdb -q
+	check_file /etc/services /var/db/services.cdb services_mkdb -q
 }
 
 build_netgroup()