Use cdn.debian.net (GeoIP) instead of ftp.debian.org by default

See http://wiki.debian.org/DebianGeoMirror for the details

bin/xen-create-image

@@ -180,9 +180,13 @@ xen-create-image - Easily create new Xen instances with networking and OpenSSH.
    --mirror=url Setup the mirror to use when installing via
                 debootstrap. (Default value: mirror used in
                 /etc/apt/sources.list or for Debian
-                "http://ftp.debian.org/debian/" and for Ubuntu
+                "http://cdn.debian.net/debian/" and for Ubuntu
                 "http://archive.ubuntu.com/ubuntu/")
 
+                The above mentioned Debian mirror hostname uses GeoIP
+                to choose a more or less close Debian mirror. See
+                http://wiki.debian.org/DebianGeoMirror for details.
+
    --template=tmpl
                 Specify which template file to use when creating the
                 Xen configuration file.

bin/xt-guess-suite-and-mirror

@@ -49,8 +49,9 @@ full text of the license.
 # Fallback to Debian or Ubuntu in case we can't find anything
 my $fallback = 'Debian';
 
-# Which mirrors to use if everything else fails
-my %fallback_mirror = ( Debian => 'http://ftp.debian.org/debian/',
+# Which mirrors to use if everything else fails (cdn.debian.net uses
+# GeoIP, see http://wiki.debian.org/DebianGeoMirror)
+my %fallback_mirror = ( Debian => 'http://cdn.debian.net/debian/',
                         Ubuntu => 'http://archive.ubuntu.com/ubuntu/' );
 
 # Which suite to use if everything else fails. For Debian "stable"

etc/xen-tools.conf

@@ -230,12 +230,13 @@ mirror = `xt-guess-suite-and-mirror -m`
 #  If you like you could use per-distribution mirrors, which will
 # be more useful if you're working in an environment where you want
 # to regularly use multiple distributions. The following are the
-# default values used:
+# default values used (for Debian the GeoIP feature is used, see
+# http://wiki.debian.org/DebianGeoMirror):
 #
 # mirror_sarge = http://archive.debian.org/debian
-# mirror_lenny = http://ftp.debian.org/debian
-# mirror_squeeze = http://ftp.debian.org/debian
-# mirror_sid = http://ftp.debian.org/debian
+# mirror_lenny = http://cdn.debian.net/debian
+# mirror_squeeze = http://cdn.debian.net/debian
+# mirror_sid = http://cdn.debian.net/debian
 # mirror_dapper = http://archive.ubuntu.com/ubuntu
 # mirror_edgy = http://old-releases.ubuntu.com/ubuntu
 # mirror_feisty = http://old-releases.ubuntu.com/ubuntu