* removed old hard-codced 500MB limit on size of *._TOKATTR (string-buffer) in IndexSetForLoadingStage.cpp
- now use macro MAX_STRINGBUFFER_SIZE = (DWORD_MAX & (~AllFlags)) --> 2GB
- fixed limit check (the actual exception was previously only catching on 1st insertion after overflow)
* debugging for v1.x->v2.x index upgrade