apt: Set Default-release to "squeeze".

Note that we don't use "stable", since squeeze is still testing right
now.

diff --git a/etc/apt/apt.conf.d/10default-release b/etc/apt/apt.conf.d/10default-release
new file mode 100644 (file)
index 0000000..e3f6d27
--- /dev/null
+++ b/etc/apt/apt.conf.d/10default-release
@@ -0,0 +1 @@
+APT::Default-Release "squeeze";