Merge changes I53f71dc0,I3a899a3a,I3e8bd245,Ie7c9db83,If396326e,I6f4cf8da,I3bf96dd0...

* changes:
  git-servlet: Fix comparing uploadFactory with the wrong DISABLED instance
  Prefer static inner classes
  Override equals for SwingLane since super class PlotLane defines it
  Make sure a Stream is closed upon errors in IpLogGenerator
  Make constant static in RebuildCommitGraph
  Make inner classes static in http code
  Cache filemode in GitIndex
  Remove unused parent field in PlotLane
  Removed unused repo field in WorkDirCheckout
  Extend DiffFormatter API to simplify styling