[syslog-ng] [git] 3.6queue prefix in branches changed to 3.6

Hi, For consistency, I've renamed all "3.6queue" prefixes in branch names to 3.6. This makes them possible to push all "pending" branches with a single push call and is consistent with the branches aimed at different major releases. I might remove the prefix altogether in the future (e.g. using no prefix for development branches destined at the latest master), but as I'm working a number of things in parallel for 3.6, I prefer to keep them as one bunch for now. -- Bazsi