xentools4*: /var/lock and /var/lib/xenstored -> /var/run

[Christoph Badura <bad%bsd.de@localhost>]

I propose two changes:

xentools as we configure it today end up with XEN_LOCK_DIR as /var/lock.
At least xl(1) ends up in use /var/lib/xl as lock directory.
That is wrong under NetBSD as /var/lock doesn't exist.  /var/run
is more appropriate because that gets cleaned at boot.

Also XEN_LIB_STORED ends up as /var/lib/xenstored and xenstored puts its
"tdb" into that directory.  However that file is ephemeral and must be
removed after reboots.   Debian moved that file to /var/run/xenstored and
that was also recommended as appropriate location in
https://blog.xenproject.org/2014/05/01/9124/.

I guess I could be talked into removing xenstored/tdb immediately before
starting xenstored in the rc.d script, too.  I'm not sure if xenstored can
be restarted and recover from the "tdb" file.

--chris

patch-.._m4_paths.m4:
$NetBSD$

The xenstored database is ephemeral and must be removed during system boot.
Put it into /var/run/xenstored. The ocaml xenstored does that too.

/var/lock doesn't exist on NetBSD, use /var/run instead.

--- ../m4/paths.m4.orig	2015-11-03 10:11:18.000000000 +0100
+++ ../m4/paths.m4	2016-03-24 21:27:43.000000000 +0100
@@ -83,7 +83,7 @@
 XEN_LOG_DIR=$localstatedir/log/xen
 AC_SUBST(XEN_LOG_DIR)
 
-XEN_LIB_STORED=$localstatedir/lib/xenstored
+XEN_LIB_STORED=$localstatedir/run/xenstored
 AC_SUBST(XEN_LIB_STORED)
 
 SHAREDIR=$prefix/share
@@ -103,7 +103,7 @@
 
 case "$host_os" in
 *freebsd*) XEN_LOCK_DIR=$localstatedir/lib ;;
-*netbsd*) XEN_LOCK_DIR=$localstatedir/lib ;;
+*netbsd*) XEN_LOCK_DIR=$localstatedir/run ;;
 *) XEN_LOCK_DIR=$localstatedir/lock ;;
 esac
 AC_SUBST(XEN_LOCK_DIR)