nfsiso release criterion change proposal

[Kamil Paral]

> > Current Beta criterion reads:
> > 
> > " The installer must be able to use the HTTP, FTP and NFS remote
> > package source options "
> > 
> > The new proposed Beta wording is:
> > 
> > " The installer must be able to use the HTTP, FTP and either NFS or
> > NFSISO remote package source options "

Adjusted.
https://fedoraproject.org/wiki/Fedora_18_Beta_Release_Criteria