databases/cego: update 2.34.0 -> 2.35.0

• Fix in CegoDistManager::checkKey ( used for verify tableset admin commend ). Check for foreign key has been redesigned
• Fix in CegoBTreeCursor::getFirst, _pAttrCond has to be checked for 0, otherwise a core dump may occur ( detected with verify tableset admin command )
• In CegoViewObject::toChain() the view object reference string has to return complete information including the tableset. Otherwise, references to foreign tableset objects with the view will not work correctly.
• Fix in CegoDistCursor to support multiple view references in a query ( e.g. select a from v1 where exists select * from v1 ... ) In the past, this might lead to infinite loops, since just the view select reference was used. Now the reference is cloned. The usage of clones results in several fixes for the CegoSelect::clone and underlying clone methods
• The previous problem regarding query cache is a result of the new introduced select cloning. The extended query id string should solve the problem
• Fix in CegoSelect::getId, the values of the parent join buffer have also be added to the query id string, otherwise, nested queries which references attributes to parent join buffer can not be distinguished
• Introduced simple selects, e.g. select 1, select sysdate, etc for select queries without any object access This might be useful for example for database connection validation queries

Submitted by: Bjoern Lemke <lemke@lemke-it.com>