+ sanity checks when loading server config in ConcordDmnLib/Corpora.cpp: ensure subcorpora are reachable
+ changed handling of multiply-defined bibl fields
- formerly caused fatal errors, now just produce warnings
+ fleshed out ReadXmlField() in Bibliography.cpp to handle e.g. constant XPath expressions (especially for built-in integer fields (date))
+ allow server:MYNAME syntax in ddc_server.cfg for providing symbolic names for branch servers
- useful for log files shared by multiple branch servers
+ more robust 'vstatus' and 'info' commands via try+catch in CDDCBranchServer::GetSubcorpusJsonArray()
- detect and report error strings for each subcorpus rather than falling back to server-loop catch
- runtime queries to buggy subcorpora still trigger the server-loop catch, returning just an error message