- there is no sensible default value for the reply-code in basic.return
- '*.reject' should default requeue to 'true' so we don't throw away
messages by default
- we consider MRDQ to be a mis-feature, so we shouldn't use defaults
that bring it into play
- it is illegal to bind to the default exchange, so we shouldn't make
that the default
- routing-keys should be specified in most cases, so no point having a
default of ""
- it makes no sense to have an empty queue name in 'deliver', and
'declare-ok'.
Hubert Plociniczak
Tony Garnock-Jones
Matthias Radestock
Karol Skocik