DWDS/Dialing Concordance Code

* Changelog tweaks

v2.2.5-pre1
* fixed weird fatal "ERROR: CheckOccurrences failed! occurrences are not sorted" error for pathologically long token lines
+ v2.1.25 built a consistent index and emitted warnings, but assigned partially indexed file data to *next* corpus file
+ v2.1.26-delwin and later throw this error at end of indexing ("return-bool" -> throw/catch)
* failed document indexing now initiates a rollback of in-memory index buffers via net methods CConcIndexator::RollbackIndexOneFile(), CIndexSetForLoadingStage::RollbackLoadIndex()
+ fixes "orphaned" token data as produced by v2.1.25
* exceptions from CConcIndexator::IndexOneTableTextArea(), CConcIndexator::IndexOneFile() should now be propagated to console and to *._error_log file

+ tagged ddc-2.2.4

* ddc v2.2.4 release cleanup

+ tagged ddc-2.2.4-rc1

+ tagging v2.2.4-rc1

+ query-lexer fine-tuning for negative dates (interference from fixes for mantis #19051 "6-er")

* added linux kernel-style branch prediction macros likely(), unlikely()
* added index-compile-time negative-year support for CBibliography::ConvertDateToInt()
* hacked slice computation for negative years in CQCountKeyExprDateSlice::Evaluate()
+ slice labels always round *down*, even for negative slices, e.g. slice(1974/10)=1970 but slice(-1974/10)=-1980
+ without this hack, slice-label 0 would cover a 20-year interval (-10..9)

+ updated scripts/{int2date,date2int}.perl for signed-year encoding

+ added support for negative years in utilit.cpp date2int(), int2date()
- probably breaks date-savvy indexing & runtime code