[MERGE] Log all missing keys in pack fetch operations that fail due to missing keys.

[Ian Clatworthy]

Ian Clatworthy has voted approve.
Status is now: Approved


For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3C1236512205.31799.3.camel%40lifeless-64%3E
Project: Bazaar