Align message type usage (BC)

[andig]

Fix https://github.com/spali/go-rscp/issues/69

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 48.57143% with 18 lines in your changes missing coverage. Please review.

Project coverage is 47.58%. Comparing base (6020765) to head (054db9d).

Files with missing lines	Patch %	Lines
cmd/example/e3dc.go	0.00%	9 Missing :warning:
rscp/client.go	0.00%	6 Missing :warning:
cmd/e3dc/e3dc.go	0.00%	3 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #70      +/-   ##
==========================================
- Coverage   47.83%   47.58%   -0.26%     
==========================================
  Files          28       28              
  Lines        1315     1303      -12     
==========================================
- Hits          629      620       -9     
+ Misses        652      649       -3     
  Partials       34       34              

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