[Fontconfig] How to ignore OpenType Collection fonts

[Werner LEMBERG]

>> Current LilyPond has added limited OTC support.  Soon, LilyPond
>> will be added more complete OTC support.  However, it is still
>> limited and ignoring OTC fonts are necessary.
> 
> Hmm, I’d think it should be trivial for an application that support
> font collections and CFF-based OpenType fonts to support CFF-based
> collections, there is nothing fundamentally different here.

Well, we use ghostscript to convert PS files created by lilypond to
PDF.  And gs has no support for OTC yet.  Note that the PostScript
format doesn't support OTCs at all (and never will).


    Werner