multlib and splitting packages

[Bill Nottingham]

Rahul Sundaram (sundaram at fedoraproject.org) said: 
> Bill Nottingham wrote:
>> Just to note, if you fix multiarch conflicts by moving libraries to
>> a -libs package, your new -libs package should obsolete the older
>> versions of the package where the libraries came from. This is so
>> that yum upgrades work properly.
>
> Please add this to the packaging guidelines.

I'm not seeing an obvious place that this fits.

Bill