[scribus] Trying to build scribus 1.5 on macos: fails to find suitable libcairo

[Richard Sharman]

> 
> You no longer need to specify -DWANT_CAIRO, that is all that is supported. We 
> need to fix that doc.
> 
> Also, do a port install cairo, its not called libcairo on macports.
> 
> Craig

Thanks, Craig;  it now builds!
Richard