Support multiple APT preferences snippets for the same package name pattern.

This is implemented by adding a "package" parameter to apt::preferences_snippet,
so that define names can be kept unique while the package names are
not necessarily.

Closes: Redmine#3468.

1 files changed, 7 insertions, 0 deletions

diff --git a/README b/README
index bdb8185..82d216a 100644
--- a/README
+++ b/README
@@ -314,6 +314,13 @@ Example:
       priority => 999;
   }
 
+  apt::preferences_snippet{
+    'unstable_fallback':
+      package => '*',
+      release => 'unstable',
+      priority => 1;
+  }
+
 apt::preseeded_package
 ----------------------