apt: Set Default-release to "stable".

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..4143a94
--- /dev/null
+++ b/etc/apt/apt.conf.d/10default-release
@@ -0,0 +1 @@
+APT::Default-Release "stable";