Persian in bgl files

[mehdishahini]

Hello,
In BGl Files the name for "Persian" is "Farsi" so when a dic is in Persian language, GD can't determine its language;
So it is not possible to change direction to rtl in article-style.css.
I should this should be fix in langcoder.hh and language.cc.
I think some lines should be added ({ "fa", "Farsi" } and addEntry( "fa", "Farsi", QCoreApplication::translate( "Language", "Farsi" ) );).
I am not sure how.
Thanks