[HarfBuzz] Character mirroring and the OMPL

[Khaled Hosny]

Hi Behdad,

According to the spec[1] character mirroring uses a fixed OpenType
Mirroring Pairs List[2] (I guess for stability in case Unicode changes
mirroring properties as was done in the past), but HarfBuzz does not use
it and uses the Unicode mirrored property instead, is this intentional?

Regards,
Khaled

1. http://www.microsoft.com/typography/otspec/TTOCHAP1.htm#ltrrtl
2. http://www.microsoft.com/typography/otspec/ompl.txt