Enhanced trace message and fix missing newline on blackholed auctions
Router auction tracing enhancements.  New command line arguments --trace-all-auction-metrics and --trace-auction-messages.  --trace-auction-messages assumes the role previous played by doDebug.  Further instrumentation coming...  Also, some optimizations to pass shared_ptr<> by const ref instead of by value where that is sane (the caller will not release its shared_ptr<> until after the call completes and the caller is not capturing the ref for future use without taking a by value copy).