Log Message:
update to 2.3.6
This fixes some integer overflow/memory corruption/heap overflow
security problems: CVE-2008-1806, CVE-2008-1807, CVE-2008-1808

other changes:
-new function `FT_Get_CID_Registry_Ordering_Supplement' gives
 access to  those fields in a CID-keyed font
-code  to validate  the new  `MATH' OpenType  table
-API for cmap 14 support
-A new face flag FT_FACE_FLAG_CID_KEYED
-misc bugfixes and other improvements