separate spool dir for test cases
bugfix: destinations should get their spoolDir from their parent table

in particular, not from the config, so that it stays easy in tests to
just create a table
extend test, more better info
make destination/conn flush interval configurable
fix conn close and shutdown behavior, nicer log output
better conn close & log output
configurable reconn interval, use in test case
more useful output
reset slow* variables upon new conn, so we can use spool
beginnings of better handling of bufs to retry
close conn if flush errors
some more useful log info