Item11267: Update references for repo change

 - Remove all the perExtension repos for the core + default
 - Add the distro repository
 - Re-scan all the logs using the '--folllow' parameter to find commits
   on relocated files.

git-svn-id: http://svn.foswiki.org/trunk@17900 0b4bb1d4-4e5a-0410-9cc4-b2b747904278
Item11267: Preparing for migration to git

 - Add task update function,  disable by config
 - Add unit tests for the task updates

git-svn-id: http://svn.foswiki.org/trunk@17901 0b4bb1d4-4e5a-0410-9cc4-b2b747904278