Check doublepost per client, not per area, take 2

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 12.79%. Comparing base (fceb244) to head (62a4c98).

Files	Patch %	Lines
core/src/packet/packet_ms.cpp	0.00%	9 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #345 +/- ## ========================================== - Coverage 12.81% 12.79% -0.02% ========================================== Files 56 56 Lines 4754 4759 +5 ========================================== Hits 609 609 - Misses 4145 4150 +5 ```

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