updating local CVS to new location of setup

[Robert Collins]

This is just a hint, for anyone caught short by the rapid
decision-to-move and actual move.

If you edit cinstall/CVS/Root and change
...:/cvs/src 
to
...:/cvs/cygwin-apps
and edit cinstall/CVS/Repository and change
src/winsup/cinstall
to
setup

then you will be able to carry on doing cvs updates and cvs diff with no
interruption to your work.

Rob