Upgrade the documentation

Signed-off-by: Markus Rekkenbeil <bionix@grml.org>

grml-debootstrap

@@ -94,7 +94,7 @@ Configuration options:
                              /etc/debootstrap/packages
       --debconf <file>     Pre-seed packages using specified pre-seed db file.
       --grmlrepos          Enable Grml's Debian repository (deb.grml.org).
-      --backportrepos      Enable Debian's backports repository (backports.debian.org).
+      --backportrepos      Enable Debian's backports repository.
       --keep_src_list      Do not overwrite user provided apt sources.list.
       --hostname <name>    Hostname of Debian system.
       --nopassword         Do not prompt for the root password.

grml-debootstrap.8.txt

@@ -40,7 +40,8 @@ Options and environment variables
 
 *--backportrepos*::
 
-    Enable Debian's Backports repository (http://backports.debian.org/) via the
+    Enable Debian's Backports repository (squeeze: http://backports.debian.org/
+    and others: http://http.debian.net/) via the
     /etc/apt/sources.list.d/backports.list configuration file. This provides the
     option to install Debian packages from Debian's backports repository.