remove duplicate variables from config

... because they are already in Paths.mk:
BINDIR, LIBEXEC, PRIVATE_BINDIR, PRIVATE_PREFIX, SBINDIR, SHAREDIR,
XEN_CONFIG_DIR, XENFIRMWAREDIR, XEN_LOCK_DIR, XEN_PAGING_DIR,
XEN_RUN_DIR. Remove unused PKG_XEN_PREFIX, which was also incorrectly
assigned to PRIVATE_PREFIX.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
[ ijc -- ran autogen.sh as requested ]

configure

@@ -602,7 +602,6 @@ INITD_DIR
 CONFIG_DIR
 XENFIRMWAREDIR
 PRIVATE_BINDIR
-PKG_XEN_PREFIX
 PRIVATE_PREFIX
 SHAREDIR
 XEN_LIB_STORED
@@ -1904,7 +1903,10 @@ BINDIR=$prefix/bin
 SBINDIR=$prefix/sbin
 
 
-LIBEXEC=$prefix/lib/xen/bin
+case "$host_os" in
+*netbsd*)  LIBEXEC=$prefix/libexec ;;
+*) LIBEXEC=$prefix/lib/xen/bin ;;
+esac
 
 
 LIBDIR=`eval echo $libdir`
@@ -1925,10 +1927,11 @@ SHAREDIR=$prefix/share
 PRIVATE_PREFIX=$LIBDIR/xen
 
 
-PKG_XEN_PREFIX=$LIBDIR/xen
-
-
-PRIVATE_BINDIR=$PRIVATE_PREFIX/bin
+case "$host_os" in
+*freebsd*) PRIVATE_BINDIR=$PRIVATE_PREFIX/bin ;;
+*netbsd*) PRIVATE_BINDIR=$BINDIR ;;
+*) PRIVATE_BINDIR=$PRIVATE_PREFIX/bin ;;
+esac
 
 
 XENFIRMWAREDIR=$prefix/lib/xen/boot
@@ -1946,7 +1949,11 @@ XEN_CONFIG_DIR=$CONFIG_DIR/xen
 XEN_SCRIPT_DIR=$XEN_CONFIG_DIR/scripts
 
 
-XEN_LOCK_DIR=/var/lock
+case "$host_os" in
+*freebsd*) XEN_LOCK_DIR=/var/lib ;;
+*netbsd*) XEN_LOCK_DIR=/var/lib ;;
+*) XEN_LOCK_DIR=/var/lock ;;
+esac
 
 
 XEN_RUN_DIR=/var/run/xen