#199 Setting redId on tlp_request() has no effect

[Bernd Löhr]

Setting redId on tlp_request() has no effect, because the request telegram is created and inserted into the send queue, regardless of redundancy state.
Currently, the user has to check whether the request should be omitted or sent.
-> possible solution: the send queue needs to be examined for same redundancy group being set.

[Bernd Löhr]

Check, if redId set redundant before, if true return immediatly.