Kernel prepatch 6.19-rc7

The 6.19-rc7 kernel prepatch is out fortesting.

So normally this would be the last rc of the release, but as I'vementioned every rc (because I really want people to be aware and beable to plan for things) this release we'll have an rc8 due to theholiday season.

And while some of the early rc's were smaller than usual and itdidn't seem necessary, right now I'm quite happy I made thatcall. Not because there's anything particularly scary here - therelease seems to be going fairly smoothly - but because this rc7really is larger than things normally are and should be at thispoint.

Along with the usual fixes, this -rc also includes a newdocument describing the process to replace the kernel projectleadership should that become necessary in the absence of an arrangedtransition. The plan largely follows what was decided at the Maintainers Summit in December.