taking control of another package's file

[Joe Van Dyk <joevandyk gmail com>]

I'm creating an RPM that creates a new /etc/auto.master file (for
automounting directories).

Currently, the autofs package owns this file.  So when I try to
install my RPM that overwrites /etc/auto.master, it complains about a
conflict between my RPM and the autofs RPM.

What's the correct resolution here?

Thanks,
Joe