- removed hack suppressing initial empty sort-key fields in CDDCBranchServer::GetFirstHitsFromCorpora()
+ hack introduced in v2.1.4 (2017-07-07) as workaround for buggy v2.1.3 empty-field changes
+ appears no longer to be required after disabling COUNT_KEY_COMPAT (i.e. since v2.1.9, 2018-03-08)