DWDS/Dialing Concordance Code

+ 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

+ added test for mantis #47973: double-escaped slash in CQTokRegex::toString()
- still UNRELEASED (waiting on next ddc release, v2.2.4)

+ optimized out implicit regex for negative literal filter conditions in in CFreeBiblStringIndex::GetFilterValue()

* updated version (work in progress)

+ src/CommonLib/ddcString.cpp: fix for double-escaped slashes in CQTokRegex::toString (mantis #47973)

+ tagged DDC-Concordance-0.47

+ added parseAddr() call in new() to help ensure consistent $client->{connect}

+ tagged DDC-Concordance-0.46

+ DDC::Concordance v0.46: updated Changes