HEADS UP: src and ports hashes will respin, doc partially affected

[Ulrich Spörlein]

Hey folks

due to some late breaking authormap changes, we will have to redo the 
conversion of the not-ready src and ports repos (doc will remain 
unaltered of course, as that horse has bolted ...)

Sometime tomorrow, I will push the changes and as a result
- most refs in src
- most refs in ports
will need to be force pushed and you'll need to rebase your work on top 
of that. You probably have practiced this already by now :/

Sorry for the inconvenience, if you think you lost some part of your 
work due to that, please reach out to me (and stop touching your clone!) 
as git is very good at actually _not_ losing your work.

As for doc, it will have a force-push to the refs/notes/commits "branch" 
which will result in the total repo going from 110k commits down to 55k 
commits. src and ports will undergo the same treatment as part of the 
final conversion run and push.

As no one branches or checks out refs/notes/commits, this should be 
rather uneventful.

Regards
Uli