databases/cego: upgrade 2.45.6 -> 2.45.8

• Fix in CegoSelect::setVIewCond, a view condition id has to be calculated which is later used for getQueryId(). Otherwise, wrong query cache entries are used in case of views with outer conditions
• Added method CegoBTreeNode::verifyLeafFull for full btree verification in a sense, that each btree value is compared with the corresponding table data entry via datapointer reference
• Improvement in CegoAdmAction for input handling. Used the same methods for nextChar and friends as in CegoAction
• In CegoXMLSpace, changed access methods for mediator, primary and secondary in a way, that the default value ist the current hostname. In this case, no attribute values are set up. This reduces complexity and avoids to change the entries manually, if the hostname changes (do not edit the database xml without any deeper knowledge).

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