+ final cleanup for v2.1.0 release
+ lexer/parser update on build from fresh checkout -- why?
+ tuned down worker-thread log messages to 'debug' level (avoid syslog bloat)
+ implemented run_query for leaf server
+ run_query command for leaf servers
+ threadqueue variable name fix
+ tagged ddc-2.1.0-rc2
+ json2kwic.perl fix
+ updated to v2.1.0-rc2