[Bug 531105] New: Useless font auto-installer calls

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Summary: Useless font auto-installer calls

https://bugzilla.redhat.com/show_bug.cgi?id=531105

Summary: Useless font auto-installer calls
           Product: Fedora
           Version: rawhide
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: medium
          Priority: low
         Component: fontconfig
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
         QAContact: [e-mail]
                CC: [e-mail], [e-mail]
    Classification: Fedora

The font stack triggers the PK font auto-installer for stuff like N'ko or
Ancient Persian for which fontconfig has no orthography

Therefore, those calls will never succeed and the user is bothered for no good
reason

fc-query/cache should also generate PK metadata for unicode blocks, so that
when the font stack needs a glyph which is not part of an orthography, PK can
search for fonts that cover the corresponding unicode block (stuff like symbols
will probably never make it in an orth)