Support meters with DLMS encrypted data

[james2810]

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Support of meters of kind Sagemcom T210-D using DLMS protocol with encryption

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Native support of DLMS encrypted data (by providing required key as configuration parameter)

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[Apollon77]

I need to see if that makes sense here .. in fact DLMS is more neanr to mbus ... but we will see

[zloe]

I would also support this request. Alternatively the encryption could ofc. be done "outside" of this adapter. But having it all in one place "feels" better.
Btw. depending on different providers in Austria there are different standards used.

[Apollon77]

Additional infos: #298 (comment)