DWDS/Dialing Concordance Code

+ relaxed yyQLexer bareword restrictions for subcorpus labels (allow bare '/', '*')

+ optimized CConcSession::InitFileReferences() using binary-vs-linear dispatch (up to 1.5x faster, avg 63% faster)
+ inspired by Alexey's delwin commit r1294

* updated mmap()-support docs in ddc_files.pod

+ updated change-log

+ udpated docs for v2.2.0
+ renamed optional socket scheme prefix "tcp://" to "inet://"

+ merged -r1321:1383 svn+ssh://mukau@.../p/ddc-concordance/code/ddc/branches/delwin-merge2 into trunk
- includes accepted changes from branch delwin@...:1352

+ integrated 'delwin' branch changes into trunk (via delwin-merge2)
- delwin r1179-1294
- delwin-merge r1295:1309
- delwin-merge2 r1313:1320

* added -O/--options option for ddc_dump (dump *.opt)
* added DefaultQueryIndex clauses to CConcIndexator::SaveOptionsToString()

v2.1.25:
* fixed bug causing empty count results from count-queries with vacuous date- and/or bibl-sort filters
- example: count(* #asc_date) #by[textClass]
- problem was signed/unsigned comparison of index data (DWORD) with filter bounds (int m_KeyLo.i, m_KeyHi.i)
in Bibliography.cpp CConcXml::FileMatches(), CConcXml::CFreeBiblIndex::FileMatches()

+ ddc_opt.pod: made '1 opt-file per physical subcorpus' more explicit