Looks up a key, consulting only the Pango system config database in $sysconfdir/pango/pangorc.
Key to look up, in the form "SECTION/KEY".
Return: the value, if found, otherwise %NULL. The value is a newly-allocated string and must be freed with g_free().
See Implementation
Looks up a key, consulting only the Pango system config database in $sysconfdir/pango/pangorc.