Zap all .old files
Update logging recipe to log over IPv6.
Unwind preference of IP6 here.
Merge pull request #66 from VictorLowther/pull-req-master-fda77fb192c9c1d39e5891586544cf031c6d65bf

https://github.com/crowbar/barclamp-logging/pull/66

Merged by devtool for cloudedge