databases/cego: 2.20.21 -> 2.20.22

• Added command line parameter validation for poolsize, numdbthread, numadminthread and numlogthread parameters
• Fix in CegoFactor::evalFieldValue : For the QUERY case, the select instance was not reset. Since the query starts from a undefined point, this might lead to "list position exceeded" exceptions
• Fix in CegoQueryHelper::evalSelection for isAgg-case

Submitted by: Björn Lemke <lemke@lemke-it.com> (author)